i had a couple of them. crysis at maximum for the first time was one (i saw bullet holes in the leaves!). finishing hitman 4 on the hardest difficulty was another. buying a 360, radical dreamers being released (and no one cared), fable II and gears II being released, and some halo parties with my old roomie.
top gaming moment? i don'tknow for sure. radical dreamers was a really big deal for me, even with all the issues that came with it. but i'd have to say that sitting down and beating halo 3 with my old roomie on legendary in one sitting was the culmination of my gaming year.
pathetic, i know.