Just from my own observation about how my serps travel up and down based on who is linking too me, I've found that it has less to do with what we think about as a niche i.e. busty vs small boobs or teen vs milf, and more to do with the quality of the site that is linking to me. What are their scores in regards to obl and who all they link too. What is their bounce rate and the surfer experience coming from their site.
Think about if you were a surfer on their site, would you enjoy and send time on your site also ?? If so and they have good outbound links and a solid bounce rate, I see no reason not to buy/trade for links on that site then!
