Originally Posted by
Eric F
People will never think I'm a pro if I have caps on my valve stems!
In seriousness, for me, they're just unnecessary fiddly bits that do nothing. If you prefer the look of caps, go for it. I don't.
My bike storage area is usually in semidarkness. I like using red valve caps or Continental's orange valve caps so I can see where the valve is when I pump my tires. One of the wheelsets came with one red spoke in each wheel, next to the valve. Very nice touch.