World of Warcraft
I read all the previews and got into the beta for the last two days thanks to a friend who brought me the client on a DVD because we had a data cap of some GB.
Oh boy, it delivered. I was so amazed by the huge world that lay before me to explore and to be part of it and that I have loved since Warcraft III.
Some weeks later two friends started and I had the gaming years of my live.
Gothic III
I love the first two games + expansion. I was so excited and preordered my first and only Collector's Edition.
And oh man, the developers overestimated their skills and had not enough time. The world was too large and buggy as hell (e.g. after 5 mins my game started to daycycle 10 days a sec). And their was literally no story (find Xardas, hi Xardas, the end, wtf).
Diablo III
I avoided being hyped until this. And it only it only happened in the last weeks before the release. I drove to the next city to get the game a day earlier since I thought my copies wouldn't arrive for the release. The game was ok, but couldn't keep the expectations and had major design flaws. Nevertheless, I played a lot hours, bought the expansion and played a lot more hours. Well, they patched and developed the game in the right way.
Witcher III
No hype, just excitement, since I'm burned since Gothic III and Diablo III. The first witcher game was ok, but I never completed it. I didn't play the second game for a long time, before borrowing from a friend (who had played my Witcher game and then bought the second one). I loved it and got really excited for the third part. And it delivered.