Tajmaster
Truth, Justice, all that stuff.
What exactly are you expecting from a Mac that the PC doesn't give you? It could be your hardware letting you down, not the platform.
Well my system runs with no problems, but I think I have outgrown Windows and maybe the PC in general. Thats why I have just formatted my hard drive and installed Zorin OS.
I have to admit its a lot better even if i don't get to play those fancy games, but then again I never really got into them in a big way. I am more of an old skool person and at the very max I play on the Wii and thats as new as they get for me.
Also for emulation I have my classic xbox hacked up to the nines so that area is covered well.
Have you tried OSs like QNX, ReactOS or Haiku? I think you might like tinkering with these, Haiku is kind of a continuation of BeOS I believe, have a look here:
http://haiku-os.org/