I'm a fan of 'Ultima Underworld', 'System Shock 2', and to a lesser extent 'Deus ex' and I'm having a great time with Doom 3. The thing is what I liked about those games was not all the 'complicated' bits, but the fact that they provided a very immersive world, and that's something that Doom 3 does extremely well.
It's a real shame that people are judging it for what it isn't (and what it never intended to be) instead of what it is.
I also find that gamespot review very poorly thought out. A lot of the things the writer complains about (anonymous player character, back story told through logs) are features that help make the game so immersive, and are the same features that helped make System Shock 2 so great.