For the main three... bruh I don’t even fucking care about the main three sections, to be honest; they rarely play into my judgement of a RP. OOC-wise; what isn’t inspired by my own whims/what or who I want to write, I prioritize concise presentation and a GM who doesn’t come across like an ass, and you’ll find both of those anywhere. Maybe not wordiness on Free. 

Actually Free is the easiest to typify because less-critical roleplaying tends to hit the same buttons. I would be more likely to “judge” a Free roleplay because of that, but I also appreciate a  environment where RP is boiled down to the bare essentials. Most Free RPs, you can forget about all the complex stuff in a hobby where all your world-building and lore only matters case-by-case, where it’s so easy to fall onto judging people by the objective quality of their posts... when really all you need is a reply. So I see a good Free RP as one I can RP just because without compromising my style. Otherwise it’s the second best meme zone on the site! [i]First is obviously the status bar.[/i]

I only have a lot to say about Free because I lump Casual and Advanced together, the biggest difference being activity level. I might also argue that Advanced is slightly more diverse in terms of “genre,” too, but as anime-dominant as Casual is, I can be surprised by how divergent some RPs that crop up are from the norm. Though that makes me sound like I’ve been around a bit, haha.