I have one on my touring/commuting/errand bike. My DH thinks I'm dorky, but I don't care. I also have a really expensive TT bike that I'm threatening putting a kickstand on because I'm tired of leaning it against things and scratching the paint (but I won't because I don't want to look even more dorky among my tri peers).
Put it on your bike. The weight won't make a difference, and the ease of having a way for it to stay up on it's own will be more than worth it. Bicycle dorks unite!