Same here, looking at my list of games completed (94) in the past 5-6 years, there are 53 FPS games and 19 (typically arcade) driving games.
I think the trouble is that I find them easy to slip into, you can just start playing them with little learning curve. Deeper games have to be really well thought out to grasp me early on. Stuff like KOTOR managed it, but not Mass Effect, RTW or Oblivion. I'm sure they are good games but sometimes I feel a bit overwhelmed with options at the start, I need to be eased in gently (which is probably why I enjoyed games like Deus Ex that increase the complexity as they develop).