@MoyaiIt'll be heavy fantasy with a traditional medieval feel to it in terms of the general setting with varied areas (forests, ice caverns, seas, floating cities as an example). In a previous RP that I GMd, I made use of a very simple point system that players seemed to like so might implement that as well so that players get a sense of character advancement. Yeah, there will definitely be twists, the focuswill probably be character interaction though. The game would have a "Quest Board" with rewards and such that players would take on and in game events as well.
As for the player character, it's really up to you how you want to create it.
Swords, guns, different non-human character would all be fine.
Hopefully this helps a little.
