Probably the entire experience of playing Jade Empire. That game was awesome. Not quite as enjoyable the second time through, maybe because I already figured out how to use paralysing-palm + Iron Palm to defeat 1v1 opponents and it gets old after a while.

All of Baldur's Gate 2, everthing was epic! And the ending of Half-Life 2:Episode 2, can't wait for Episode 3!

So many hours in Wolfenstein Enemy Territory. Clutch clan matches at 4 am cause I lived in Japan, and just being a part of a community in that game.

The last level in Portal, when you are descending into the lava. And then killing Glados with 1 second remaining because I messed up. Clutch.

Fallout 3. Nuff said.

My fav moments

- Baldur's gate 2. seriously the peak of PC Rpg gaming where it was focused on Role-playing and story. (the game is still in a class of its own today).

- First multiplayer game in doom. playing coop and deathmatch doom in 1994, having an insane amount of fun and just knowing it was the future, which came quickly with quakeworld in 1996-98. Consoles got their first major taste with halo really.

- Diablo 2 patch 1.10+ Hell skill level with hardcore characters in coop. Most crazy crazy coop fun!

- WoW. before BC and before WoTLK, back when guilds were in blue gear that had no special bonuses beyond standard stat increases (no +damage, no +crit). walking into molten core for the first time with 39 other players and nailing the a couple of bosses on the first night. while the grind afterwards sucked, that first run was nothing short of awesome.

The first time I played doom. It changed my life.

In fact, I wish some "new school" gamers would play any dam FPS against me with a keyboard alone...we'll see who's boss

Watching Hitler Explode at the end of episode 3 of Wolfenstein 3D

Playing Diablo via lan with my wife and looking up at the clock and realized 9 hours had gone by.

Playing Half-life 2 for the first time.

Fighting Melissan in Baldur's Gate 2: Throne of Bhaal. Plus the ending.

Beating Little Big Adventure 2: Twinsen's Odyssey with no mana cheats! =D
Getting a near 12 excitement rating on a roller coaster at Roller Coaster Tycoon 2! =D