If there is too much original lore or a too fantasy-ish world, I might actually be deterred from joining. I'm better with universes I know well, or the real world, I think.
What I do enjoy seeing is well thought out plot that sounds like my character can be an important part and get to interact in fun ways with others. Super powers is always attracting me haha. And digimon 8)
Used to join any pokémon journey RP that popped up haha, but lately... I haven't been feeling the journey vibe ;; that's sad. I want to get my journey gears going again, hmm.