If you could have control over one kind of magic, which would you choose...and why?

I went with Wind, but I'm also assuming it's a Final Fantasy based poll, and Time Magic is mostly limited to things that will speed up or slow down things a little. Nothing like being able to go back and time and fix all your mistakes, finish your homework instantly as far as real time is concerned, or reverse aging. Otherwise Time is the obvious choice, it's by far the most impactful on daily life. Sure, maybe Fire looks cool, but that doesn't beat enormous tangible effects.

Otherwise Wind would be pretty great. Skip the commute, it can perform Lightning's job as a power source to boot as well. If it's powerful enough it could stop deadly hurricanes, tornadoes, etc. as well. And it would be fun to boot.

Healing would be a close second. It wouldn't be a fun power to have, per se, but there's so much good that could be done with it.

Lightning, Ice and Time are honorable mentions.