Of late I've been vaguely entertaining the idea of buying into the Xbox 360 ecosystem at some point. Maybe. There are ancillary factors - interoperability of accessories with PC, likely carryover of Kinect to any successor system, media server functionality - but, unsurprisingly, games are the main consideration. In that respect my interest has been piqued of late by Vanquish, Child of Eden and the upcoming Catherine.
So my question is: what else should I be looking at? There's no magic number of titles which is going to flip the decision switch to 'buy', but the more the better!
EDIT: Changed thread title to better reflect nature of discussion evolved therein.