Uncut here.
To people who say things like "it's fucking gross and disgusting. The first time I saw an uncircumsized penis I almost threw up, not kidding," I say that their reaction is caused by having grown up and seen mostly cut ones.
The thread
"flaps" discusses the appearance of protruding vaginal lips. In general, men aren't as sensitive as women on the look of their genitalia, but some uncut guys still might feel offended by your post. Me? I don't care. My wife had never seen an uncut penis before, and it took her some getting used to, but she didn't run away screaming, or treat me any different than a cut guy.
For those who use the "teenagers will be emotionally hurt" argument: teens will always have insecurities. Whether they have acne, braces, or a penis that's different from other people's.
As for the smell issue, my answer is the same as other people on my side of the fence: soap and water. If it's fresh and clean, your penis will smell like you(if you're also fresh and clean).
HIV: Use a condom, you should whether you're cut or not(unless you know for sure, with tests, that your partner is disease-free).
I don't see the need for circumcision.