Luckily I don't have to spend all day in any apps, since I have a lot of varied responsibilities. GIMP is sufficient for me for most bitmap/photo editing work and there's certain parts of it I like better than PS. Inkscape is underpowered; okay, but not my favorite. Then again, neither is Illustrator. In a pinch, I can use Adobe products either on my old Mac or the Win7 box, but that's usually for using old files or opening files from others. (I have a KVM.) It can be inconvenient using non-Adobe tools, but I figure now is a good time to break vendor lock-in. Five years ago I still found GIMP insufficient but that's no longer the case.

Believe it or not, two iPad apps have become really important design tools for me- iDraw, a vector graphics app, and ProCreate, a painting app. They cover most straightforward duties. I was very surprised at their power, and not having to whip out the graphics tablet is nice. Working anywhere from an iPad mini retina is pretty liberating. Obviously the laptop is still needed for on-the-move coding, but again, that's Linux, despite the (good) Mac hardware.

He says he uses Windows 7 as well, FWIW.