Propably I repeat a lot of others who had a say in this thread before me but:
PvP takes a huge chunk of all roleplay which is done here. Some factions shoots others that's what they do and that's how player should roleplay them. Just because a character spit out 3 lines and started to shoot you doesn't mean that player behind the character doesn't plays his role well enough.
Expect more chats with friendlies or neutrals if you want to have conversation style thing.
Also, group chat is concidered out of roleplay most of the time. Exceptions happens, but those are rare. So use local/system chat.