Are you the type of player that sits on a bench and waits for RP to come to you? If so, then no server is going to be the best.
You have to take a active participation in generating RP as well as joining in with the RP.
You have to accept that you may walk up on 100 'afk' people before you find 1 who is open to random walk-ups.
Are you active on the forums? Are you willing to not only sign-up, but also generate events?
Are you a 'guild' rp'er?
Are you a 'random' rp'er?
Do you know how to fill out a RP add-on's physical description box correctly?