I have the same issue. It's mainly because of writing style. If a roleplay's name is interesting to me, then I will get check it out. But, if the posts are just one sentence or even one paragraph, then I will leave the roleplay.
It sounds a bit elitist, but I like roleplays with more writing. If a roleplay has people who write three or more paragraphs and it's interesting, then I will join.
For that reason and many others, I can't find a roleplay on this site. This site doesn't based on how good or bad your writing style is, it's based on the genres. Which bugs me a whole lot.