Syntax is probably where I see the most RP. Although RP is cool on Vector, because of its hostility it adds an element of danger and there are harsher consequenses for your actions, which makes you a better player IMO.
Also the best thing about this game is that your not locked into one class or org or even apperance forever. The only thing that can't be changed is your name, your gender, and your original level 1 stats.