Ohhhh I can't resist saying something in the lines of 'Dead or Alive Xtreme Beach Volleybal'. Always there's sunshine, you can sit on the beach, watching those beautiful bouncing boobies women playing sports and buying lingerie for them.. Note, I never played the game, just saw some commercial from it so perhaps there's a darker side to it.
Somewhere in the Forgotten Realms settings would be cool to. I can remain in my ivory tower for a few decades, studying and experimenting my magics. Afterwards I'll go out adventuring, and turn into a wizard of epic proportions! I could conjure up my own mansion, or a nice sunny beach with beautiful women playing sports.. oh wait..
Supreme Commander wouldn't be too bad of an idea either. I'll build my own city, extremely shielded, with countless of anti air, anti land and anti nuke systems. It'd be a bit boring perhaps, but not if I choose one of the beach levels, it's quite sunny and the water is the prettiest blue!
If all else fails, I'll be on a continuous LSD, acid and XTC trip (never did those before, but sound interesting in this context), and play Audiosurf with the wickedest music around.