This game is ****ing amazing, there is no other way to put it. I don't have much of a scare gland myself, and have only jumped once or twice, but the game is major fun. People that don't like it need to pull Gabe Newell out of their ass, HL2 isn't going to be the ONLY ground-breaking game this year. You can't deny that this is a great game, the graphics are amazing, the engine is phenomenal, I didn't think I would be able to run the game at MEDIUM, let alone medium at 45 FPS.
But Ultima is right, the game was never advertised for it's engine (even though amazing things will be developed on it), it's always been about it's scare factor and amazing graphics. HL2 was advertised for it's Havok physics engine, and all the great mods from HL1.