I find myself roleplaying a lot even though i'm not in a RP-Server.
Sometimes roleplaying gives me strenght to do something i wouldn't do otherwise.
For example i wanted to level up my rogue to 110 but i wasn't finding the strenght to do it.
So i decided to roleplay a pirate. Transmoged, picked Outlaw spec and talents resembling pirates (Cannon Barrage) and did a lot of Battlegrounds while leveling.
Before i knew it i was level 110 and i had fun all the way through.
Also, if i decide to play Assassination in Battlegrounds i listen to Metal Gear Solid ambient music just to get in the mood of a sneaky opportunist bastard.
Do you ever roleplay, even if you aren't in a roleplay-server?