Vector graphics
Although my graphic illustration skills range from crappy to mediocre, on occasion, I will surprise myself by creating something that looks cool. For the longest time, I used a program called Xara. I then switched to Illustrator when I got a discounted license. I have never really liked Illustrator, because although it is very powerful, the tools are not intuitive. Once you RTFM and figure it out, it seems obvious, but I have had to do it often enough now that I am fed-up and have decided to switch back to Xara.
Since I last used it (about two years ago), Xara has evolved signficantly and there are now a number of features that make web graphics amazingly easy to create. I am switching back. So long Illustrator.