I have to hide my face and shamefully admit that I gave up on the genre long ago. Perhaps now I'm a bit older (and wiser?) I might have more success. The same with God games... never saw the attraction of them myself. Give me Alien Breed 3D over Populous or Simcity etc.
I think 3D games are here to stay, apart from games that don't really warrant it. Scrabble, Chess, board games etc work much better in 2D. Personally I love Scrabble, but the latest PC version is VERY unstable on every machine I've tried it on.