Ever since MOO3 came out, I've come to accept that I won't be buying any more games for a long time to come. (And yes, I do enjoy MOO3. Would be even better if they'd fix the multiplayer bugs, but alas...)
Halo was good fun on heroic (no, I didn't buy it, my brother did), and that's basically my FPS allotment for the next decade since I'm not into FPS. (They're all the same to me gameplay-wise, not to mention each successive generation just puts more strain on the old vidcard without any substantial improvement in enjoyability.)
I have SimCity 4 on the shelf (bought for me by a certain someone who owed me a favour), and I haven't tried it successfully yet. (It wasn't until recently that I figured out the problem with my Radeon 9600 SE that caused Generals and Warcraft to fritz.) But that could be a way out.
Strangely enough, the games keeping me going right now are from the good ol' days of DOS. Comparatively bad graphics, but they have it where it counts. When in doubt, just DOS it!