What would a good partion be for a Boot Camp install if I were planning on playing The Sims 2 and all of it's expansion packs, Spore, Sims 3, and about 2-3 other games???
Sims2 + expansions can eat up a lot of disk space. Add in a few other games, and I wouldn't even consider less than 32GB. Realistically, any space used for Boot Camp is lost to you for regular use, so use as little as you can get away with, but not less than you can foresee using within a year (the maximum time I've personally run XP without a reinstall).
