I do see a few cyclists on my commute and love overtaking them on the long parts of my route but there isn't actually much chance to get a legitamate overtake.
I normally try not to pass people at traffic lights.
Sometimes, when we are stationary at the front of the cars I ask them if they want to go first or if I can go in front.
There are a couple of people I regularly see on my commute that I feel differently about overtaking though.
A lady that drives a touring bike, loaded panniers, high vis, helmet, lights in day - I feel bad for overtaking her as she keeps fair pace but is slow and cautious down hills.
A bloke who rides wearing a Beret, chromed 'retro cruiser' bike, no lights/reflectors, doesn't ever look behind himself, goes through every red light without changing pace or looking around.
I overtake her as kindly as possible and only when it's really easy, but him I overtake aggressivly and try to stay as far in front as I can, although I get overtaken by him again as I wait for the lights which pisses me off