Yeah, you should definitely try using it again - especially since the big 3.0 release.

Menus and tool names/functions still do not map perfectly onto Photoshop's (it is its own thing after all, so why should it?), but it is a serious and sophisticated piece of software. Easily adequate for my professional reproduction work.

I switched to it from Photoshop two or three years ago and had to spend a few hours watching tutorials and reading the manual to make the transition. But now there is hardly anything I can't do in GIMP at least as fast, easily and reliably as I could in Photoshop.