(a) why do they play games? (similar surveys have yielded some surprising results to this question)
(b) why do they play the games they play? (similar to above question, but aimed at drilling down into genre, preferred game-play styles, licences vs. original content, etc.)
(c) what about games really bug them? (e.g. having to download patches for PC games; games too short/too long/too repetitive/too difficult; dodgy AI; crap UI; lazy level design; too few save points in console games, etc.)
(d) do ratings on the cover affect their purchases?
(e) how do they decide to buy? (eg. word of mouth, online reviews, magazine/newspaper reviews, TV advertising, after playing demos, watching pre-release AVIs, etc.)
(f) how long have they been playing games?
(g) have they ever purchased downloaded games/shareware?