I mostly use Netbeans, just because that's what's on the laptop for every day FRC stuff. I love netbeans because it has oodles of features, but sometimes it thinks it's better than you, and does something stupid to the beautiful formatting. My Favorite IDE is probably eclipse then.
I've never used intelliJ, but I've heard it's great.
I used notepad++, but then decided that I liked sublime text better. Honestly, sometimes I skip the IDE all together, and just compile and run the code written in sublime text in the terminal because it makes me feel cool.
