Well, I've been commuting on my carbon road bike for a little while now and today I took the Schwinn Mesa GSD mountain bike. Interesting... I changed the tires and put some 26x2.0 Specialized Armadillos on it which made it roll easier along with some Slime tubes. This made it pretty much bomb proof. Added some lighting front and rear along with putting the reflectors back on for safety.
What was interesting was that it didn't take but at most 5 more minutes to get to work. I was also able to ride on the shoulder when I wanted because I had no fear of the piles of rocks or whatever other crap was there. It really made it much more fun as I didn't have to stress about the bike. I also have it locked outside on the rack where before I had my bike next to my desk. MTB shoes were much easier to walk in also. Was a little harder on me cardio wise, but that's the reason for switching to the MTB. Only going to take the road bike on the weekend rides and I'm hoping that I'll be able to fly on it after commuting on the MTB. Planning on switching out the front forks with some steel ridged forks from Nashbar soon. Using my messenger bag to tote stuff (not much stuff) so no need to put my rack on it. Overall, I'm pretty happy with this setup. Anyone think I'm a nut for doing this?