Coming from a first time GM, I can tell you that creating a roleplay isn't easy. It's something you have to be really confident about, along with very, very organized. As a GM you have people depending on you to post consistently and lead them into a good roleplay- hm. . . Maybe I should start this over. 
*Take Two* 

Towards the first thing you stated, about having effort and various genres: 

This is a natural thing with people- From the most Advanced writer to someone in the Free section: Everyone appreciates visuals. Something that catches the eye first will get them to stay just a little longer. That little bit longer might be what you need for them to read what you have to say. Aesthetics always catch people’s attention. If you have nothing but, straight walls of text, it'll more than likely send people scurrying away. (Hey, maybe not all, but definitely a lot.) If you have walls of text, put some in hiders, to give the *illusion* that it isn't as much as it seems. 

Now, just because I say walls of text scare people off doesn't mean you necessarily can't add information. When you can show that you have a plan of where things are going to head in your roleplay, more people become interested. It's the whole, "Not too much information, but not too little information" ordeal. That I believe is pretty self explanatory. 

Confidence is key! When I got my roleplay started, [b] Pirate Age [/b] I was so nervous that it wouldn't do any good and that it would be ignored and brushed to the side, but with some encouragement from some friends, I managed to relax and not worry so much. [S] I think I'm just rambling sorry. [/s] 

Hmm, something that might help in your lack of roleplays might be to make friends. This is a community for everyone to enjoy writing. Go hangout in the Member Lounge and find some people that you may have things in common with. You could then a) see if they want to roleplay (and with a friend, you can easily tell each other if something is going on or if you want changes to be made, whereas telling a stranger could be kind of awkward) or even b) organize and plan a roleplay out together with that friend whether it be a 1x1 or Group. If it's a group, that's two good ideas being put together and more likely to get interests. 

About the person who isn't responding: I've had that happen to me before. I say just let it go and try to find someone else. 

Don't worry, you'll eventually find that one RPer that you're so compatible with, you guys can't contain all the ideas, hah. 

Annd, yeah I hope my random gibberish helped a little bit. x.x' 

*Thumbs up* 

Good luck out there.