Hi James and welcome
Alan is the expert around here on recent experience on US bases.
The basics don't change though, you need to be able to enjoy and put up with others company whether it's your choice or not and also you need to be able to be self-contained and not "needy". You need to be flexible in your job and a team-player rather than an individualist.
There are two parts to coping with living in Antarctica, one is about how you deal with the physical isolation and the practicalities of a cold environment. The other takes place in your head and deals with the way you cope mentally with isolated group living.
It's not easy, but I've never met anyone who regretted going, the majority wouldn't have changed it for the world and it imprints itself on your heart and mind like no-where else for the rest of your life.