Goth doesn't do much for me, but I dig the emo look.

And I don't think there'd be too much of a problem finding enough of-age emo guys. I went to a show by an indie/postrock band here just recently and I'd categorize 90% of the audience as looking pretty emo or indie hipster or a meld of both (I was in the remaining 10% hehe) and it was an 18+ show. And a lot of guys had wristbands to drink, so they were over 21.

I think the difficulties in starting up a site like this would be the same as in starting up any site focused around a very particular look and type of guy, with the added issue of the look/type involving a trend that may or may not last very long.

It's similar, in a way, to having a site all about guys with big dicks. You launch your site and it's chock fulla guys with 10''+ penises but after awhile you end up using some 7.5'' and 8'' - dicksizes that are nothing to shake a stick at and mighty fine indeed, but not necessarily what one thinks of when checking out a site that's supposed to be all about really big dicks.

Or sites that are all about football players or soccer players or ruggers and the like. After a while you can tell they just found some random dude and threw a uniform on him. Same goes for military guy sites. But at least their talent pools are larger, though a great many suffer from the same issues regardless.

I dig the emo look and usually just get my fix on that front in other porn (the occasional DVD or site that has the odd emo-lookin model).