List:
Luffy: neither, they'd be too confusing.
Nami: Ski cause she'll think she would look cute in the little sweater.
Zolo: He would use three skis
Sanji: Snowboard to impress the ladies.
Usopp: Snowboard, if he can learn how…
Chopper: He would look so cute on a tiny little snowboard...
Robin: Ski for the sake of skiing
Q: What if Luffy met Mr. Fantastic??