I'm a graphic designer, professional and all. One of the biggest and most important things that I learned in school, both High and College, was that it's not about the version of the software, it's not about the software at all. It's about the end result. It's about good design. If you're comfortable using Photoshop 3, and you can do the same stuff and get the same results as someone using CS3, then keep at it. Just like an artist who uses the same brushes and paints and canvas for years at a time because they feel right, or just like that old catcher's mitt, some people get accustomed to software, they know it inside and out, it feels good to them, it works well and it does what they want it to. That's the important thing. The software is a tool, just like a paintbrush or a ruler. It's just a means to an end.