I use a bunch of graphics software. Amongst them are: Paintshop Pro X3, Gimp, Painter photo essentials 4, CorelDRAW Essentials 5.
And, just recently (today actually), I've managed to install CorelDRAW 7 (complete version) on Windows 7, which didn't work on Vista. Whooooohoooooooo.

Man, I loved that program. And, even its an old program (Windows 95), its still a great graphics suite.

I've tried many graphics programs, and they all have their pros and cons. Best is to find the right one(s) for you and master them.
Cheers