Urban Fantasy, High Fantasy, Epic Quest, Sci-Fi, Time Travel and World Hopping, Steampunk, Action/Adventure, Modern Drama, Mystery, Slice of Life, Romance, and many more.
1) Make sure you've read our Roleplay 101! Don't worry, the rules are super simple and easy to follow
2) You can start looking for players by either
Posting an Interest Check in Roleplay Talk
(explain your idea, its genre and plot, for example "I want to do a SciFi roleplay about robot soldiers who try to take over Earth")
Messaging people who have posted in the Roleplay Invitations/Requests thread, if it looks like they'd be interested
(for example, if they've mentioned that they like Medieval Fantasy and High Fantasy stories, it's probably safe to assume they'd be down for a Dragon Quest RP)
Making or requesting a roleplay bannner to put in the ad rotation
You can check out the Writing and Art Museum for lots of people who will happily make a banner for you!
Simply posting the roleplay in the Jump Ins forum!
(if you post here, you are not allowed to choose who joins, what character they play, or that character's role in the story. Jump Ins are roleplays that anyone can join anytime.)