RPG, with shooter if possible. I do enjoy some action, though. For instance, I'm all over the upcoming Chronicles of Doryen. Real-time roguelike.

Over the years I've played every genre conceivable, but depending on the amount of free time and mood, my preferences are such:

1. TBS   For when I have the most free time available... delivers the most satisfaction in the long run than any other game genre, offering the greatest challenges and longevity, IMHO.

Current favourites: Galactic Civilizations II /DL/DA/TotA, Age of Wonders: Shadow Magic, Disciples II (but I think I most prefer the "4x" empire building games the most, such as the GalCiv series and others).

2. FPS   Short on free time, for when I just want to jump in and out and have fun... mostly for stress relief, although this category can be subdivded: pure action, tactical, rpg or in current trends of the genre, a blending of all three elements.

Current favourites: Counter-Strike: Source, Far Cry, Unreal Tournament.

3. RPG   Although there is a "role playing element" to most games, I guess I prefer the terms "class" or "character" development which involve some sort of skill upgrading or unlocking and a decision making process by the protagonist (but not always) affecting the path or outcome of the story.

Current favourites: Deus Ex, Vampire The Masquerade: Bloodlines, Fallout 2.

That's it for the most part.

My interest still leans heavily toward the 4x empire building category... best bang for the buck me thinks!

space combat flight sims and mech sims

RPGs and Turn based strategy games.

Some RTS, like Conquest Frontier Wars and Sup Com.  As long as the pace is not too deadly slow and put me to sleep.