I was overall pleased with Microsofts E3 conference this year i thought it was well done. That Halo 3 trailer they made with real people was tight and etc. etc. but to get past my thoughts on the conference here are the games I am most looking forward to for my 360 at the moment.
This list is in no particular order...
Halo 3
Ninja Gaiden II
GTA IV
Resident Evil 5
I'll try to think of more but if yeah keep an eye out for these games as well I think they are worth your attention. K peace.