Don't know much about unix/linux. I can use Linux, and I do on a regular basis, but when it comes to setting it up I don't really know what I'm doing. I'm sure I could muddle through it if I really wanted to.
Web programming. Not so much that I don't understand it, just that I don't find it interesting at all, so can't be bothered to learn much.
3D modelling software. I had a go with Maya but I didn't get very far. I don't really enjoy it, I'd prefer it if someone else did the artwork and I programmed if I were making a game.
I like hardcore programming in C, Java or similar language. I need to learn C++ at some point though since that's quite an important one.