What kind of CPU, GPU and Memory do you have Minsc?
i7 920 @ 3.3Ghz + 5870, nothing too crazy. I don't know if it's just the AMD CPUs, but I read a lot of people need to set core affinity to 1 for various games, and I've yet to have to do such a thing with mine. Then again, I also read about tons of AMD GPU issues, and I don't really have much trouble there either.
Most of my hours were spent with Sim City 2000 out of all the games, followed by 3000. Haven't put any time in to 4000 yet, but I keep hearing so many good things about it, I just grabbed it on sale.
A real 3D entry to the series with a well-written, modern engine would be very welcome to me. My hope is such a game would sell well enough to spark interest in looking in to other older sim games too. Sim Golf 2 was mentioned earlier in the thread, I still have the original, and play it time to time. Looks great, but being able to switch to a 3rd person view and play out your course like a Tiger Woods golf game would be sweet. They could put in all sorts of challenges too. Same goes for a lot of the other sim games from the DOS / early windows era.