I will summarize on what I had said before, as many others have noted the topic was discussed prior, but it bears repeating.
The needlessly detailed, overly complicated, excessively specified character sheets are not so much creative as they are busywork; boxes with checks to be filled. The information contained in such things are less applicable, generally speaking, with each section added beyond those absolutely essential to the game's being. Unless the information may be relevant, why include it as a requirement? Just for the sake of people better defining their characters? Why not simply ask them to specify and elaborate, creating more of an overview? Moreover, why not simply emphasize that in game? So on and on it goes, it becomes another hoop to leap through, one that may even be blazing if these are hard requirements; miss the mark, likely be unable to play in the game at all.
In contrast, the concept of no character sheet is spectacularly trusting of a thread's owner, and more or less denies players too, the ability to get an idea of who a character is. It eliminates fact checking and functions solely on trust. Conceptually, one should ask themselves this, would they allow any number of randomly chosen players on the forum to just participate? It has its function in say, topics where the players know one another or have reputations that precede them, but otherwise? There is no vetting, no review, no reassurance. It no less affords an issue of trust that might be naively optimistic. It might be sincerely more organic and natural but that is not always a positive force. So too might such an absence create voids in continuity or details that are unclear, both of which can be rectified, but acquiring players who all have a similar understanding of what is desired? Even more difficult than it regularly is, which is to say, more than it already need be.
Ultimately, the best stance on a character sheet is one that is purposeful. It has only what is required, removes any superfluous additions, and keeps some amount of mystery to the character. No small amount gripe about "personality" sections of a profile and how it might "spoil" the character because someone should only learn it in game, but it should be information that is generally observable or typical to the character. Why? Set aside a moment for one's own thoughts and think how to summarize another actual person's personality in a paragraph. A set of generalities, is it not? Does it include those finer details? No, but it almost assuredly hits the key notes without spoiling any of the finessed attributes. Even that has a defined purpose in most cases. Thus, as noted before, only what matters should be present, as in if the game is about subtleties and intrigue, it might be wiser to exclude it. For most, in contrast? Almost assuredly better to have it.
As a further addendum, I stand by the notion that a character sheet is a list of information to be reviewed by the master of the topic, a contract of sorts if you would, and what a character and player will be held to. A character, or even a player if as much happens to be the case, should be excluded if they do not meet those standards. A throw of the metaphorical dice on hoping they will abide by nebulous expectations known only by the creator is more often than not a death sentence. Affording a template and concept of the angle deflects some of that threat.
Vixere
Dixie Fiend
TokyoPewPew
Shin Ghost Note
Blizz
Darth Cognus