If you're on a Mac or Linux, it's easy to switch to a click-through model where you don't have to click a window before selecting a tool. It renders GIMP usable on a Mac if you do this.
Personally, I just haven't managed to get into Pixelmator, I always try, then end up running back to GIMP, and I'm not a heavy user of the program by any means, though I did do all the FemCal art in it.
The biggest fix to GIMP right now should be to get 16-bit color depth working. 12-bit isn't a huge problem for me, but I can understand it holding people back who are doing lots of photo manipulation.
Personally, I just haven't managed to get into Pixelmator, I always try, then end up running back to GIMP, and I'm not a heavy user of the program by any means, though I did do all the FemCal art in it.
The biggest fix to GIMP right now should be to get 16-bit color depth working. 12-bit isn't a huge problem for me, but I can understand it holding people back who are doing lots of photo manipulation.