I think I tried a version of JCreator - not sure what it was I didn't like too much about it...but I did eventually abandon that for NetBeans.
Now that I'm starting to get interested in Android (
http://code.google.com/android/) and therefore doing a bit of Java development again, I'm going to give Eclipse a try again - mostly because Google's provided an Eclipse Plugin that's suppsosed to help with Android development....they do have plugins for other IDE's but the Eclipse one is supposed to be the most tightly integrated.