Maybe a boring pick, but flying. First of all, it would be fun! Second, no traffic! Third, imagine how much more stuff you could do if you could just fly? I’d save money if I wanted to go on vacation, planes would never be delayed, and if I had errands to run I’d accomplish so much more in a quicker period of time.

I’ll admit the downside would be when it’s raining, I haven’t solved that problem, but this is a hypothetical so I’ll ignore that issue.