i would definitly agree with RE 4 getting game of the year, one of most enjoyable titles i have played for a long time. the mix of 3rd pp combat, combined with tradition button bashing and panic gameplay was amazing, combination of fmv sequences and gameplay was just another great usp for that game. also for its style, and quality of art media.
i bet the engine had crazy LOD and occlusion testing systems to deal with all those prefabs. It also some of the best animation iv seen in a game.
as for dissapointment of the year, i dought il be the only person to say this, but the gaa game was complete crap. nothing further to say on it.