I have a lot of time this semester, instead of posting so much here I could find a new hobby, any suggestions for something fun to try? (no music or sports, doing that already)

Depending on your budget, buy an older car and fix it up. I'm sure there are some cool old BMW Alpinas around your area. Great Euro tuner cars.

I mean, I'm biased because I'm a huge car guy, but hey it's a suggestion

Dancing? Or is that both?

Politics.
Volunteering.
Toastmasters.

Travelling
Learning a new language

weapon stockpiling

I can imagine there are a lot of hot girls in yoga and dancing classes.

http://oyc.yale.edu/ do some open yale courses you are interested in