Theoretically, I'd like all the roads to be paved in smooth ice and I would speed skate everywhere ever. Or maybe figure skate depending on the day. Or if I had friends, maybe we could all play hockey/bandy on the way to the supermarket.
Realistic transportation? My Supra, but I'd probably be happy with any Japanese 80s sportscar, especially with a manual transmission. Also, I'd like 400-500hp. So my favorite mode of transport would be sportscar or race car. I've never really tried a motorcycle, so I don't know, that could change in favor of a motorcycle.
Other than that, cycling is very good for shorter distances, and quite relaxing and a good workout and all that. I like inline skating, but compared to ice for me, it's completely deadly of an activity. Once you hit a hill, say your prayers. Yikes.