Aspyr is the undisputed king of crappy Mac ports (and infrequent software patches), but they're an evil we all live with because they're parented by EA, who makes a rather significant chunk of the games we play.
One of my biggest beefs with Aspyr has always been SimCity 4. After all these years, they STILL haven't managed to make the game stable and glitch-free, even running natively on a PowerPC. $50 for a game that doesn't work and cannot be returned for a refund. If that isn't robbery, I don't know what is. Eventually, I ate it and bought the Windows version.
In rare instances, you'll run into a game by a developer who was actually thoughtful enough to develop both a Windows and Mac version simultaneously. But for the most part, if I really want to play a game, I'll just buy the Windows version and Boot Camp into XP.