If you use Windows, consider Paint.NET ( http://www.getpaint.net ) instead of GIMP. It's much quicker (particularly the 4.0 beta builds) and has a much more Photoshop-like UI out of the box.
I like Paint.Net a lot on the windows side... for Mac/Linux alternative, look into Pinta http://pinta-project.com/ ... it's essentially a cross-platform port of Paint.Net They do the vast majority of what most people need in a simple photo editor.
Their github (https://github.com/PintaProject/Pinta) makes it look like the project may be abandoned.