Electrode's list of reasons why Paint Shop Pro OWNS Photoshop:
1. On my dual Pentium 3, PSP starts in less than 1 second. PS takes 12 seconds.
2. The UI is very simple and straightforward. The same can never be said for Photoshop.
3. It supports every Photoshop plugin I've ever wanted to use. And that's a lot of plugins.
4. Somewhat related to 2, PSP is completely usable at 640x480. Not photoshop.
5. Paint Shop Pro costs about $150 US. Photoshop costs much, much more.
I could think of many, many more points for this list, but for now, 5 is enough.
Yes, I use Paint Shop Pro. Yes, I own Paint Shop Pro. Legitimately.
Give me one good reason why I should even bother to pirate Photoshop.