@BlackSpyder, you summed that up nicely. Since we are talking (sort of) about graphics software, has anyone seen
Splashup? It is a bit more complex than Paint, but much easier to use than Gimp or Photoshop, and it is just as free as Gimp.
The only other thing left out of this conversation is that while it might be great to install Ubuntu (or whatever flavor of *nix is the soup dejour) just to be able to use a free graphics application, there are other considerations. One of the things that makes 'nix based systems frustrating is the dizzying array of available software. The problem is that there are differences between the various distros (BlackSpyder and AA would be more authoritative about this) and applications compiled for one platform or kernel may or may not run on a different distro. For someone that just wants their software to work, this is gets to be a pain in the ass. There is software to help manage the installation of applications which sort of addresses this problem, but if the software that you want is not in available, you have few options. One, you can find the source and try to compile the application yourself, or you go on an information hunt and try to figure out how to make the application run on your platform. The amount of information is overwhelming, and unless you have some idea of what you are doing, you could spend a ton of time trying out solutions that are not even applicable to your problem.
However, if you are a bit adventurous and curious, Linux can be fun. There is a ton of help available, but I have found that one has to take the time to do their research before asking a question. Like many other forums, people tend to be snotty towards people that have not put in the legwork to at least try to help themselves. I have found Linux help forums particularly acerbic. There are a ton of free applications available, and it can be particularly rewarding when you get something to work. Linux tends to be more stable, unless you fuxor up an installation.
I used Linux on my server for quite awhile, and I also developed on it for quite awhile. For some purposes, Linux is a good choice, but as was already mentioned, it depends on what you are comfortable with.