[AlphaWeaver]

I'd absolutely point to Space Station 13. A old game built on a terrible engine, but with an active development community because the source is open. Each server runs a slightly different variant of the game, and a fair number of servers enforce "heavy role play."

I'd recommend a server like Baystation 12 if you're looking to get involved in an RP server. A small bit of googling can point you in the right direction.