[DanTails]

I voted for everything but puzzle, stealth, and flight, but RPG and other sim types would probably work best, because you can at least tie bosom size to a stat there and not have to show every inch possible. (And, it's easiest to abuse. Gotta give love to the WOW and beyond crowd hopefully) and those kind of games, with multiple party members, are best suited for that sort of thing. Platformers and shooters don't lend themselves well to BE or other paralyzing transformations, in my opinion.

..then again a flight game where you're dropping boob bombs on all girl schools or something might be fun in a silly way, too.