Fun part, the air pressure inside your lungs (and fluid pressure in other areas) will try to equalize the instant you move to an area with different atmospheric pressure. Just going from one place with a high pressure system to another city under a low pressure system you are at least going to have one heck of a time with your ears popping (if they don't outright rupture your eardrums), your vision will be messed up for a bit, and expect some 'gastrointestinal distress'. Try going from sea level to the top of a tall mountain and good luck regaining consciousness any time soon. I'll stick with my desired superpower of flight, because i know whatever means of propulsion it uses would surely burn calories so i could lose some weight by having fun flying around