I play on Dragonblight (PvE) But will soon go to play on the upcoming PvP RP server with some friends of mine, which will come with the next patch.
On Dragonblight I play alliance, My two main characters are: Asriel, lvl 60 dwarf paladin. And Hagbard: lvl 34 Human Mage.
On the PvP RP realm I will make an undead mage.
So if you want to roleplay with players that don't have 5 lvl 60 alts to back them up, you can create a character on the fresh PvP RP realm. Provided that you like roleplaying that is
Anyhoo, it's a great game! And I hope to see you soon in Azeroth