I've gotten rather good at bash scripting over the last 6-7 years, since I started using Linux regularly. I've made a few aborted attempts at tutorials for C, perl, and python, but none of it has managed to stick for long.
I guess I just don't
need anything other than bash, although I do have a couple of applications in mind that I'd like to write if I had the ability. If I had the time and energy to really study and get good at it, I think I could write some pretty decent stuff (as long as it doesn't involve complex mathematics. I suck at math
).