twink is a bit like straight teen.. it's a bit saturated.. find a nice niche and do it well and don't worry too much about it being "reality" or not.. just focus on what surfers in the niche want and provide it in spades and in quality.
technically
www.sexgaymes.com could be considered reality with all exclusive location shoots, behind the scenes footage etc, but really it's just focussing on the jock/sport/wrestling/muscle "niche" such that it is.
so pick a niche, focus on quality movies.. sure theme it and make it exclusive if you want.. but remember it's just like any other site. Picking one or the other isn't going to make or break you unless you have a particularly awesome idea.