I just recently started doing some Java development (despite vowing never to again), and one of the reasons I'm kinda cool with it is Intellij. Intellij makes it way easier. Things just work (subversion, Spring, hot swap).
The same has been true for me in Eclipse for over 8 years.
a) git integration. Egit is bad and barely functional. I ended up abandoning it and doing all my git interaction at the command line. I rarely need the git command line with IDEA. b) Maven integration. We use a custom Maven setup that I could never get Eclipse to work properly with; it insisted on using a stock setup that could not build our projects. IDEA's Maven support just works; I run the Maven goal from the sidebar and it runs in IDEA just like I typed "mvn <rule>" at the command line.
I still use Eclipse for C and C++ development, but I will probably abandon it for even that soon. I have just never been able to get into Code::Blocks.
The lack of native development is one of the main things keeping me from giving IDEA a proper try. It may well be better than NetBeans, but NetBeans works well now, and has decent C & C++ support (at least as good as CDT, anyway).
I do have a personal license for IDEA 12, and would have no problem paying for an upgrade to 13 - it's just not worth my time (yet) to do so.
There are a few annoying bugs I've run into in NetBeans 7.4, and Android dev isn't awesome in NetBeans, so maybe there'll be enough impetus for me to give IDEA a real shot soonish.
Or the NetBeans bugs will get fixed, and I'll just stick tight. I'm happy either way!