Yeah, I use Intellij daily, and the UI is quite poor. Little things like the way tabs work, the way the debugger buttons are inscrutable, the way that the vertical splitting works with opening files using the C-S-n shortcut, etc are quite annoying.
It's redeeming quality is that the only worse UIs are every other IDE. (Expecting perhaps Visual Studio, which is not a viable option for non-MS shops)
