[kls]

Discalmer these numbers are totally made up.

Now that I got that out of the way,

80% of people are going to say Eclipse. 10% are going to say Netbeans 10% are going to say IntelliJ

I personally like Netbeans, I was a little worried when Oracle took it over, but so far they have been pretty good with the Netbeans project. I like Netbeans because it feels "bolted together" it feels like the IDE was built on a cohesive vision, where Eclipse many times feels cobbled together to me.

If you don't like monster IDE's then you will probably have some heart burn with all three and most Java IDE's most are trying to provide enterprise tooling because that is Java's core market. Given that they have to target that market to get any mindshare you get a lot of bloat. To me though I would say IntelliJ and Netbeans stay out of you way more than Eclipse does. I also like Netbeans because I do quite a bit of JavaScript work and Netbeans has the best Javascript development and debugging support out of the 3.

[zeroxsys]

Can you do Google App Engine in Netbeans?

[kls]

yes there are a few vendors that make an app engine plug-in. I am not sure if Google puts out an official plug-in for Netbeans though. I use a Andrioid Developer Kit on Netbeans that is packaged by a third party and it is as well put together as the Eclipse one.