In my experience, every ARTCC has its own culture. It is difficult to judge an ARTCC's culture until you actually go there and experience it for yourself. Some ARTCCs are very different than others and the only way is to experience them. Don't like where you are? You can transfer to another ARTCC 1 time every 90 days, so you have that option available to you.
K
And you could always informally hang out before you commit to 3 months with them.