Social skills are a good tool to have when dealing with groups of players. Some play paintball all the time, and some have never experienced it. Being a paintball reff is different from any other reff in different sports, safety is always #1 (keeping your goggles on/applying a barrel sock when necessary) and calling players out/reffing the game is #2. Taking a few random paintballs to the body on a daily basis also comes with the job. A lot of people show up at a paintball field not knowing what to expect so they look to you for guidance. Many players are overwhelmed during their first game and shoot at everything that moves. Your job would be to explain game rules, get the players to understand why safety (goggles/barrel socks) are so important, and make sure they have a fun and safe day of paintball.
A well behaved group that listens to your instructions will yield a great reffing experience. A group that does not listen to your rules may case for a rough day of arguments and a stressful environment.
Being friendly with a group is always a plus, but you need to know when to show authority and get them moving. As long as you understand safety responsibilities (if anything bad happens, it's on you) then reffing is, in my opinion, a great job.