Heh, my aching is usually about as accurate in its readings as any other weather forecast, so the advantages it gives is really neglectible. It turned out that my hands were a bit off on their forecast for today; it did get extremely dark and cloudy outside, but aside from that weather today has been as hot as the past couple of weeks. Consulting the internet told us that there were some pretty bad rainstorms and thunderstorms further south, but up here it just got a bit dark for a while. So convenient as it might be to some, it just doesn't seem reliable enough to me to be worth the disadvantages that comes with it.
I can move much better now that it's cleared up again, though, and the pain has lessened, so I'll at least deal with some OOC posting now. Today wasn't even that bad when I think about it; there have been times when I could barely think coherently from sheer agony and have been incapable of bending or stretching anything but the outermost joint of my fingers. Those are the really bad days... normally it's just a relatively dull constant aching that I've gotten pretty used to, yet am always aware of at the same time, and a decrease of dexterity... oh, and the fact that my knuckles crack every time I clench my fingers even some of the way, whether I mean to or not. Heh, new real-life acquaintances often seem deeply disturbed by that part. It's always interesting to see if they're the kind of people just shooting sidelong glances at you and shuddering each time you produce the sound, or if they're the kind to openly complain that it's disgusting. If not for the pain and impending disability of my hands, it might've been a fun toy to have.
Ah, there are a number of other alternatives, just none more widespread than the concept of the afterlife in the other Planes. The Catolohne worshippers of the Creator, for instance (since they completely discard the religious ideas that are prevalent in other countries), believe that just as all things came from the Creator, all things return to the to him when their time comes. Because of this the souls of Catolohne Creator-worshippers don't get afterlives like others, but have their souls fed to their Creator to be reentered into the circle of creation and destruction. People who sell their souls to the Grand Master of Evil usually don't get a traditional afterlife either, but get to live out the rest of eternity bound to the Grand Master's will by the power of their infernal contracts.
And yeah, there are far less angels in the Planes than there are demons, and far more dead spirits in the Upper Plane than in the Lower Plane. Some gods might try to convince a dead spirit to become an angel once in a while, though most won't, but they are infinitely more merciful in their recruitment of angels than the demons are to bolster their own ranks. Even Rilon will usually only try to persuade dead spirits to become his angels through temptation and trickery, which is still much better than the continuous hunting, torturing and killing of dead spirits that occurs in the Lower Plane until they surrender and become demons. In comparison, there has accumulated about twenty thousand angels since the creation of their kind, whereas there exist untold billions of demons. This is also why angels are generally stronger than lesser demons, since the power bestowed upon them is distributed to a much smaller number; the orlgarhi is the only known kind of lesser demon that is stronger than the average angel, whereas thalks are just comparable to them. There are naturally many types of both angels and demons that haven't been properly documented yet, but you get the idea; the average angel is far superior to the average demon.
I'm probably not even as ambitious as you in regard to my desire for longevity, Shien, and even more selfish; yeah, the prospect of ceasing to exist is a bit inconvenient to think about, but I'm pretty sure that not existing would not particularly bother me once I've gotten to that point, even if there is no alternative to not existing (if I die and it is at all possible, I'm definitely sticking around as a ghost), and it is annoying to think that no matter how much I accomplish during my life I will always want to do more and never complete it all, but that's not really why I want to live forever. It's not that I want to help people, to contribute, or for any kind of noble purpose like that; I simply like living. Every mundane, repetitive minute of it. I like eating, even if it's the same thing as I've eaten a thousand times before; I like watching good movies, and even half-assed ones if the mood strikes me, and even rewatching them after some time; I like to read books, write books, and reread books; I like to play games, and replay games. I like the warm sun and the cool breeze, the sight of flowers and the smell of rain. Heck, I even like just sitting around doing absolutely nothing besides delving into my own thoughts. It's not that I need to achieve as much as possible, I just want to be comfortable and stay comfortable. Being dead doesn't sound comfortable at all; I probably won't be able to do any of the things I like if I'm dead. So I don't want to die. I want to live.
The bit about the hindrance of scientific advancement is certainly one I agree with. And as if useful and downright beneficial technology getting unnecessarily delayed or discarded for reasons that I can only imagine must originate from some vague concept of ethics was not bad enough, other technologies are being withheld simply due to sheer greed (*cough*hydrogen fuel cells for vehicles*cough*). I honestly think that it's an even greater crime for humanity to halt scientific advancement in beneficial areas than to pour all their resources into ultimately detrimental ones.
Teleportation usually requires so much magical energy that it would outright kill an average human to attempt it, but this is only the case for average humans. Some humans have naturally stronger souls than others, and many other species are usually stronger than average humans, and this is not even taking into account the fact that mages naturally increase the power of their souls simply by doing their magic, meaning that even that average human could eventually come to possess the power to teleport in time (in other words, nearly every mage can potentially possess a superhuman soul). It would not be something that anyone had the power to do, and definitely not something to be done repeatedly or from anything but full capacity, but certainly not in a level that would be commonly regarded as impossible (Shien's estimates sound pretty probable in regards to the rarity of the ability). The greatest obstacle when it comes to teleportation, the substantial requirement of magical energy aside, is the sheer difficulty of doing it right; while many mages would theoretically be strong enough to teleport if they rested themselves completely beforehand, the skill to do so successfully is much rarer than the strength. It is something that can be learned, but which is so extremely difficult that it is indeed practically impossible to most mages, and thus the ability to teleport is the mark of an incredibly skilled mage more than it is of an extremely powerful one.
And as Shien surmised, Shadow Image is indeed an even rarer spell to master than the various different spells of teleportation because it is even more difficult, as you not only move yourself somewhere else, but actually exist in multiple locations at the same time.