I commute 6 miles 1 way and yes I wear full bikie gear. I want to be comfortable on the bike while riding and I can't even imagine jeans in the summer on a bike!
There's a whole bunches of threads about commuting but simply: I leave a pair of jeans and shoes here and just carry a shirts, undies and my lunch. In the winter the pack can get heavy with sweaters et al, but I Love the ride! Plus by wearing full gear, if I decide to take a lunchtime ride of 10-20 miles, I can!
Congrats on your commute, it sure does make a difference in your day don't it!
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"