I think the hobby that I am the most proud of is my knitting and crocheting. This is because I pretty much taught myself how to do it. My mom helped me with the crocheting, but even she can't knit (although my grandmother tried to teach her). I am not going to claim that I'm an expert by any means, but I hold my own. With knitting, I bought a book and some needles and plugged away at it until I had something. It's a complicated technique, but I'm pretty comfortable with it now. I'm working my way up to making a sweater.
Here's a hat (slouchy beret style) I made recently.