Recently, I've been playing RTS's by Paradox.
Crusader Kings, a dynastic simulation,
Europa Universalis II, covering the age of exploration
and colonization.
Victoria - covering from the napoleonic to
prior to WWII
Considering whether to pick up Hearts of Iron II, for WWII (and a bit beyond, I think)
Nice thing is, with the expansions, these all plug into one another,
so you can just play through one country (which I've been doing).
EU is based on a board game that I love, which
is how I got into these. Problem is they're VERY
time consuming.
Also played some GTA, daggerfall (old game), Gothic, Fallout
and with a special love, Mount & Blade (a medieval first person
combat simulation - but where you have an army to back you up
kinda plays like an FPS)
Some other older stuff, that I probably shan't pull up again,
like civ, sim city, MoM, and so on.
Oh, and a bunch of porn games.