I use Photoshop with Linux via crossover office. GIMP is OK, but I don't really care for it. I've only used Linux for the past 3 years or so, and there is no need to fuck around for hours to get a program to work unless you don't know what you are doing.
Windows is a nice operating system but I don't care to run three programs all the time just to make sure I don't get a virus or some spyware crap. Maybe the next Windows will fix this, but I doubt I will try it unless something amazing comes out of it.
For anyone who wants to try Linux I suggest
www.ubuntulinux.org -its free, and the support is excellent.