I have been think about this Air/Wind Logia for a long time and it would have to be one of the most powerful Logia's.
The things you could do with this fruit would be amazing. You would be able to create huge and powerful gusts of wind, tornadoes (you could do numerous stuff with tornadoes (ie tornado punch, drill, picking people up and tossing them around)), waterspouts, sea squalls, high compressed blast of air that would act like a bullets, would most like be able to fly or float with the wind, you would be hard as hell to catch, no natural weakness that I can see(all though Oda might).
But one of the greatest things you would be able to do with this fruit, would be to control the very thing that you and your enemy's ship or fleet depends on. This is the very reason why I think the Wind/Air Logia would be the most sought after fruit for the Pirates, Marines, or sailors in general.
I believe it was mention before by ZiK that the user would not be using the power to its fullest extent or something like that. I have always hope the SH would get a helmsmen that literally just got the wind/air ability and had no idea had to use it properly and would grew with the abilty through out the series. Wind logia helmsman = most godly helmsman ever.
I don't want to rain on the parade but there's a df i think could beat it
kuma's paw paw ability….......as he can repel or compress air
(or at least thats how is see it)
so apart from that a wind fruit would be pretty cool
and the amount of possible moves just make's the fruits potential huge
is there any fault with my kuma theory?