I had a gf that was a very good snowboarder, was amazing!
She would keep up and it was fun to always have someone to ride with.
I also had a gf for a very long time that didn't ski. Kinda sucked because id feel bad when id leave to go skiing and she was left to do nothing. Sometimes i'd even back out of skiing bcuz i felt bad.. In the end, i think a gf that rides is very awesome!!