Guess that would depend on you, and I think Windows 7 takes care of most of the crappy stuff Vista gets troubled with. Be sure though to have at least 4-6GB RAM, so it would work smooth.
If your computer in your sig is the computer you want to put 7 on, it should be fine. Just make sure that you can find drivers for 7 before you move. It's a lot easier
The best way to gage if you want Win7 is to read through the FAQ thread we have at the top. There is all sorts of info in there and answers to lots of questions. That will be a better gage on if the upgrade is worth it for you.