[vadasambar]

Might sound weird but I prefer to use Inkscape for basic image editing over Gimp on Linux because of how user friendly and intuitive it is.

[tasuki]

I also prefer Inkscape over Gimp, but they have completely different use cases.

Inkscape is for vectors (almost anything created primarily on a computer) while Gimp is for rasters (when your input consists of pixels - eg a photo).