Like most any other person, I find ultimate joy in reliving happy experiences of my childhood. Frequently, this is only made by traversing memory lane. That, or a heavy dose of eBay searching for that old TI 99/4a to play some Parsec.
Well, thankfully, there are large hordes of people spending all of their free time remaking these memories to run on modern machines. Case in point, Wing Commander: Privateer. Now I can fly about the galaxy, selling my goods and killing nasty pirates on my Mac.
Oh, and there is a remake of Parsec. Excellent...
Also check out Vegastrike, which is a "3D Space Simulator that allows you to trade and bounty hunt in a vast universe. Can you face the dangers and decisions that await..."