I had one encounter with an uncircumcised man, but to be completely honest, I was too anxious to notice anything about it.
I was an inexperienced teenager, who'd snuck out of my parents' house and into my twenty-something year old boyfriend's in the middle of the night. I was afraid we'd get caught, and he kept the lights off to keep from drawing attention. It was quick and about as arousing as an annual gynecological exam.
Other than that one experience, I've only been with circumcised men. I couldn't say whether one is better than the other. I guess it all depends on the man. *shrug*