Jet
Uncultured
I don't do romance in rp, so I can't answer that. The big downside to fandoms really is just rigidity. See I'm a massive fan of one piece and have always dreamed of rping with a group of friends through a journey from humble beginnings to challenging the world for the title of pirate king. The issue though, is people either can't divorce themselves from the fandom and won't ever get the same high they got watching luffy break into enies lobby. Or they'll be so rigid and say things like, " You're not mihawk, so you're not doing x feat".
I'm just left here sad, because I love the world and would love to come up with original ideas to expand certain parts or just relive glory moments from the anime and manga. But along with all the other struggles we have to face in rp. You also have the rigidity to deal with. That just sucks the life out of these fandoms.
One Piece RPs are impossible off the interest finder. There's awlays a large % of people with self insert captain characters. If the GM makes a captain it pisses people off but if they don't make captain it leads to pretty giant plot issues. Then everyone wants the most brolic fruits, or the highest bounty etc. I started a RP with max beginning bounty of 12 million and at least half the characters had 12 million bounties off the start. The issue with OP is the obvious outward strength indicators like bounties, crew position, devil fruits. All the inequity leads to ego conflicts OOC.
I think with a small group of people who know each other it could work, but otherwise I've been in a few OP RPs and all have gone to shambles for the same reasons.