Don’t worry about control or being unable to react in time etc or how it affects you physically.
I would eat Taco Bell and shit on pedestrians.
Run at a 100.
Flying at 10 mph gets you locked up in a CIA lab.
Run at 100 lets you become a professional runner (just run slightly faster than the record. Don’t run at a 100 mph.).
Although flying appears much more fun, running at 100mph is pretty insane, it turns you into half as fast as Sonic.
I could dash off rooftop at that speed and then glide on wingsuit, should get me quite far, I choose running.
I think that would depend on how much work either of these are.
Does running 100mph feel the same as normal running?
How much work is flying?
If running and flying are the same amount of work, then I probably won’t be able to fly very far.
Edit
Nevermind, OP said don’t worry about the physical part.
I WANT TO FLY.
I’d say fly 10 mph, might still be faster than running 100mph when going to point b. You can fly high then glide down at a faster speed and any destination is a direct line.
10mph is pretty dang fast, especially since you can just go over buildings and obstacles. Slower than a bike in a straight line, but much faster otherwise when you don’t need roads.
In most populated areas, you can get just about anywhere faster than any other mode of transportation.