Every roleplay on this forum that I have joined or hosted has been in the casual section. I don't join roleplays very often, as few people can keep them going for more than a month. However, the reason why I chose casual is because it seems like it's more active. There are no silly word requirements, and people seem more eager to post. attitudes are more relaxed. I like casual because it's just that, casual. I've never considered free. I like grammar, and the posting speeds are way too fast for me.

As for the specialty sections, I have some interest in some of them. A forum based tabletop game probably couldn't hold my interest. the real life ones move so much faster, and even they bore me from time to time. I prefer to write about characters instead of groups of people, so I don't see myself entering Nation. Arena could be fun, I read some of the fights. But I still don't believe in competitions via written word. It just seems like it's too easy to power game. Might be fun with someone you know/respect/etc however. I have wanted to try in the past. 1x1, again, might be fun if I knew someone and was in the mood for it. But starting an RP like that with a stranger is not to my liking. 

As for how I'm treated, I actually feel respected wherever I go. My ability to GM roleplays is respected by long standing members, despite my short time here. There's really no spot on the forum where I'm afraid to post.