Getting the keystrokes right when converting from other IDEs is important. This takes unnecessary time with NetBeans since it is hard to find the tree node in 
you want to change in the KeyMap editor.

For instance, I wanted to change the "Delete Line" to my preference. I expected to find this under the Edit category but after a lot of pressing and browsing I 
found it under the "Other" category. This caused frustration, lost time and didn't made me very interested in customizing NetBeans to my needs further.

I suggest a live Search text field that filters the keymap tree as you type.