I personally would...
-Get really involved in brazilian jiu-jitsu, as it's my 2nd most favorite hobby. I'd probably wind up fighting.
-When my girlfriend and I move, most likely back home, my parents are considering turning our garage in to a guest house. If so, I would take my mom's gardening area and transform it into my own garden. She hasn't had a garden in a few years, and I've always been drawn to growing plants. My father likes growing flowers and plants from seeds and bulbs.
-I'd get really involved in dogs. We plan on getting a french bulldog and an english bulldog. I'd love to become involved in breeding, training, and caring for dogs. If the hottest naked woman on earth was walking a puppy, I wouldn't even notice her over the puppy.
-I'd also look for more artistic outlets. I like working with my hands, so sculpting or carpentry or building SOMETHING would stimulate me well. I'm good at projects.
-I'd also spend LOTS of time refining the foods I cook to be gourmet-like. I started baking from scratch when I was 12 and cooking better than the average mother by the time I was 16. My mom could open up her own bakery/restaurant with her talent. I just copied her. To this day, I've never eaten more than a handful of meals cooked by any girlfriend. It's always assumed that if we're cooking, I'm cooking.
When I think about it... the older I get, the more my father and I have in common. Our brains think the same way, we're just drawn to different talents.