Guitar is great, but my favorite instrument is saxophone!
It just sounds so awesome - for example, on Pink Panther theme. Just listen to those notes!
I used to play clarinet so, if I'd complete it, I'd be able to play saxophone. But, I was too lazy and didn't care about it, so I didn't even improve myself!
I remember, when I got an exercise book: I needed to exercise with my teacher, and when I'd complete it, I'd have a test.
For first 20% of book, I did everything great, with no practising! But sooner, I started playnig badly and being no able to play notes. At that time, I was wondering why that was happening to me.
Ah well. Saxophone FTW.