I think the most effort the networks put into their reality shows is in making sure they put people that will end up hating each other under the same roof.
I guess, technically, I'll watch some of the cooking competitions which might be considered 'reality' shows... but only the ones that really are about cooking and don't intentionally create manufactured drama. Celebrity Chef, Iron Chef or Chopped on Food Network if I'm bored or just have the TV on while I'm working on something else (and while I love Alton Brown I just can't get into Cutthroat Kitchen). I used to watch Orange County Choppers, but stopped when it started becoming more of a drama than a show about actually building motorcycles.
When I think of 'reality' shows I think of the ones that are pretty much just tabloids on TV. Honey Boo-Boo has got to be the worst one out there, but there are loads of others, but I really don't like the things like American Idol and all it's clones and, possible, predecessors. The primary reason I refuse to watch those is because when you have the pool of candidates they do there's no way in hell you should have someone that is no good up there. They intentionally put people who suck on national TV just to get ratings, making them just as bad if not worst than all the others. I also really hate the fact that formerly 'smart viewer' networks like The History Channel are getting in on the act.
The only one I can think of that really has any redeeming value is something like "Biggest Loser" where they are actually trying for a positive result... but I still don't watch those.
Weren't we talking about Vampires? I'll make this discussion relevant. How about a reality show with Vampires and Werewolves living together? We could call it "Bloody Twilights".