Hmmm, fascinating topic- I wonder why more people haven't responded.
Honestly, I think it's a combination of things. Unlike most of the threads that have become so prevalent over the last few years, there's no confabulation here: it's about truthful sharing rather than wank material, and truthful sharing, even in an anonymous internet forum, can be intimidating.
And, as Subgirrl said, it requires some thought, though certainly no more real thought than a constructive post in any of the other fora. I know I sound like an old fart by saying this, but there was a time when most of the threads here were more thought-provoking than what we scroll past all too often these last few years.
Criteria:
I don't have many, actually, besides the usual.
1) 18 or over
2) I would put "Male", as I've never had sex with a woman/girl, but I can't say with 100% certainty that I would NEVER have sex with a female.
3) Poz-friendly
I've had sex with two women, and came very close with a third; beyond that, I have had at least two adult (over age 30) crushes on women. I don't rule out the possibility that I might meet either an F2M TS without a phalloplasty or a woman, fitting my criteria and preferences otherwise, could work out fine for me. My gay/straight percentage here used to be 30% straight, but I eventually changed it.
We all have the right and responsibility to set our own attitudes regarding serosorting and I completely respect your choice in that regard. It's also very different for bottoms than it is for tops; but I shall never forget my one-and-only encounter with a beautiful guy who worked for MTV-Latino in Miami who claimed to be not just "poz-friendly", but whose latest ex was poz, so I decided to give it a go as physically, he was the type that gets my dick drooling hard before we even touch. Maybe I was significantly larger than his ex (or any of his previous playmates, though I find that far-fetched

), but there was a look of sheer terror in his eyes when I put on a condom and started to attempt penetration (after my usual, extensive warm-up): I couldn't continue. He was as close to panic as he could get. That was the last time I even attempted it, and that was in 2004.
Preferences:
1) Male
2) 21-40ish
3) Hung at least average
4) dominant, non versatile Top (I am rarely the top, but it has been known to happen for the right little dude)
5) Tall (6 feet or more)
6) Bigger than me
7) non white ( preferably Latino :biggrin: )
By default, based on my preferences, I almost inevitably end up with a Latino: I refer to them as my favorite flavor of man.
Limits:
1) no scat or blood
2) I dont rim
I'll probably think of some other stuff, and add as I do so.
I don't go looking for blood and don't care much for anything that would make bleeding inevitable, but I have had one encounter with a natural "bleeder", and once I got over the shock, it ramped up my drive in a way that I cannot describe logically. The emotional aftermath of having shattered that limit, at the time, was profound.