Quote from Quickbeam
I always vote for cheerful, professional, and not "oversharing". Focus on the work and not on gossip. You'll do fine.
I like learning about my co-workers so I will ask about them (to the ones who seem interested in sharing) and will rarely share anything about my own personal life. I often find people enjoy talking about what is going on in their own life vs. hearing about what is going on in yours.
I also stay far far away from the cold and unfriendly ones who don't seem interested in having anything to do with me - there is no point trying. Nursing can be taxing enough without having to put effort into extending a hand in friendship to someone who always has an angry look and is cold as ice.
You won't get along with everyone in the group but as long as things are kept professional, it should all be good