From what I gathered in my sorta limited experience with RPing here, sometimes you'll happen to start a decent roleplay at just the right time where good roleplayers are on and interested, while much of the time there's people who are barely interested or too busy for roleplaying outside the simplistic silly stuff. There's no clear time for when you get good, active roleplayers as far as I know, it's just by chance.
I think it's best to give it time. Also, make sure to not flood the board with roleplays and/or give up on them at the drop of a hat. Roleplayers may grow less trusting of your game-mastering and start avoiding your roleplays if they spot a pattern like that.
Yeah, I get the same problem. It might be because I keep making RPs where my character's this big, fat buddy guy who can take a lot of damage, and I end up making too many comments about how fat my guy is. Do you often find yourself in the same rut.
To be honest, I tend to prefer more simplified RPs. Maybe yours are too complex?
While detail is good, when one focuses on a certain thing too much it can get annoying, and even further, creepy and uncomfortable. The view can go from "okay, we get the point" to "oh jeez, is this just to get their jollies?"
Sometimes it's best to save the deeper details for your own imagination.