I'd totally use an online one, like lunapic or picnic.. and Chris recommended one to me, but I forgot the name. OOPS - Mona Nomura

I prefer GIMP. - joshua fouts

GIMP's UI has some quirkiness (if you're a windows user, it might be hard at first), but has more features. Paint.net is a breeze to use, but GIMP is more powerful (esp with plugins) - moogs

oh, Paint.NEt has plugins now :p (havent used it in a long time) - moogs

Paint is superior for ease of use and interface hands down, but on Linux GIMP is my only option. - Brad Nickel

Downloaded Paint.NET this morning and played around with it for a while. So far it loads MUCH faster than GIMP and I'm liking the interface much more. - Nathaniel Payne

Paint.NET is good for quick image-editing jobs. - Morton Fox

Paint.NET is much easier - andy brudtkuhl