what's the functionality like when using it as a music player?
It's bloody brilliant, easy to navigate, select and play whats needed, and handy having the cover flow, if you sort them out by album, and creating playlists is also awesome.
how often do u charge it? (i wont necessarily be using wifi/games everyday, most days i'll probably only use it for music).
if just music, i'd say it'll last you 2-3 days easy, but just some games, i'd say about 2 at the minimum.
how quicker does it drain when ur using wifi/playing a game?
not that much, wifi on average lasts me about 6-10 hours, of regular use (no I dont use it for 10 hours straight, total use of 6-10 hours), hoever games seem to be a little less, about 5-8 hours i'm assuming, not a fan of games that much.