My favorite kind of role-play ranges from a realistic animal-based ones, fantasy, sometimes book-inspired role-plays, and those with a either a set theme or story. In addition, with a story behind the role-play to eventually allow freedom of the player to interact with afterwards instead themselves being "part" of the story. This usually limits what people can do in following a story, however, that's just my opinion, I'm not too much of an interested person to participate in those types of role-plays. I don't mind public or private role-plays, either one suits me just fine. I also have no mind in role-playing with beginners and experienced role-players, all the same, it's fun.