I'm a 44 yr old guy who rode his Sears 10 spd as a kid, took about 10 years off, tried road racing for one season (screwed up my right leg for awhile), did very little riding for the next 10 yrs, and then started up again last year.
I now have a Trek 6500 MTB set up with semi-knobby tires. Mostly I commute (~12 mile round trip) through the urban/suburban area between my home in southern St. Louis and my job at the Washington University Med School near Forest Park. I also do some light trail riding or road rides on the weekends. I did 50 miles on the Katy Trail recently.
Sometimes I think it'd be nice to have a road bike, but I can't justify the expense just to go slightly faster. I'm slow, really slow, and changing bikes isn't going to help much.
For exercise I also lift weights and use a rowing ergometer. My approach to exercise isn't performance oriented: I'm not so worried anymore about getting faster or stronger ( I always end up not very fast or strong and get injured) but more about staying healthy. My numbers are good (BP 110/60, midday pulse 62, total cholesterol in the 150s) except for my BMI. I need to lose about 15 pounds.
My other interests are photography (mostly high school sports, community events) and small pet turtles/tortoises.
My son, who lives with me while attending college, also likes to ride.
I'm also interested in anyone's recommendations for a good road tire for an MTB. I've looked at 1.25" Michelin Wildgripper City tires, but they are heavier than the 2.0" semi-knobbies I have now.