I went through graduate school and got a MA in religious studies before I realized I would rather spend a lot more of my time gardening and doing DIY projects. As far as hobbies go, I have my fingers in a lot of pies, but it's always exciting to learn new things, which is what I do best.
I first learned about permaculture from a friend who was planning a permaculture garden for his abbey. He was telling me about all his plans - I loved his plan for kudzu, which swallows small animals every year around her - and I was especially impressed when he said he planned to create a garden that he could walk away from for five years and be able to get it back up and running with little work. Ever since, I've wanted to get involved in permaculture.
Right now, I'm limited in my ability to implement permaculture in my life since the economy forced me to move in with my parents again, but I hope to be able to take a permaculture designer course next year. I have a wild dream of creating a website to make ideas and projects more accessible to your average person, but that's a while off yet. I also have a wild idea of building a community garden out here in the boondocks. We'll see what happens.