I've a friend who worked on Banjo Threeie (Lucky Git :p ), couldn't get any meaty information out of 'im though :p
Assassin's Creed isn't actually too bad, just don't rush it. Treat it like Aquaria - Attempt to rush through it as fast as you can and you'll just get annoyed.
Mass Effect is pretty darn good fun, and absolutely huge, but the combat and some ferocious slowdown marks it down in a few places. Plenty to improve for the sequal

I've also Guitar Hero 3 waiting this Christmas, should be a good laugh (Partially because I want a crack at Dragonforce :p )
(And yeah, I've currently Ps2, 360, Wii, DS and PSP interchanged regularly. There's good arguments for all concerned... PS3 though? I'll... wait on that one :p