to me, condoms are a major turn-off, esp if there occurs a problem putting one on. i accept them as being necessary and i think it's great that you dudes don't encounter problems with rubbers, but i've always been seeing to it to get rid of them asap in a relationship.
i have to admit that i can fuck longer with a condom, but this is just because i feel less than with a condom. i wanna feel my lady's wetness right on my dick, not some pre-delivered chemical moisture...