Russian Campus Girls - Well, not really a flop, as it at least paid the design and content and I made something like 1.5k on top. However, probably a waste of content to make an AVS site with it.
Russian Cam Babes - I re-vamped the site a couple of times and sent a lot of targeted traffic from my other Russian sites... It's just that I can do what I want, I'm unable to convert cam sites.
Euro Hardcore Teens - Was never able to push this TGP to any decent traffic level, so it's pretty much on auto pilot now.