Haha! I've been labelled a Doom 3 Supporter now have I? Well I guess it's true to a certain extent, I enjoyed Doom 3 far more than I did HL2, the main reason being that I couldn't connect with the game they way it wanted me to. I didn't care about Gordon, I didn't care about the resistance, I didn't care about the aliens. The game felt more to me like a Tech-Demo for the Source Engine.
Doom 3 on the other hand was a game that didn't try to be anything it wasn't, it set out to be a straight-forward atmospheric mindless shooter and it succeeded on all accounts. From a technical standpoint the Doom 3 engine is superior too, the game however did not showcase it in it's entirety.
For me, personally, Doom 3 is the better game, I understand that most of you disagree and I respect your opinion, hopefully you aren't all going to flame me for mine which is what always happens to the Doom 3 supporters in threads like this.
EDIT: The Doom 3 Expansion is brilliant, much more faster paced than Doom 3 itself, in other news HALF LIFE 2's expansion has been announced:
http://www.gamespot.com/news/2005/04...s_6121909.html