Caroline A. from Sedan, France says that if she had magical powers, she would love to be able to use teleportation (the ability to move from one location to another in moments-like beaming in STAR TREK) because it would be amazing to visit her friends and family that live far away, in the blink of an eye.
-I can relate to that one.
ADD TO EDIT!!
This pretty postcard, from OPUS was sent from Denise G in Chicago, IL. If Denise had a magical power, she'd travel around the world. From Chicago to Tokyo, by the wave of a finger, so that she could have books from all around the world.
This lovely postcard of a modest mansion came from Brasstown, NC and our friend, Breia B., who already has a magical power-the power of sweet talk. Let me explain. If Breia had a magical power, she would bend people to her will. She would get awesome authors, like Jessica Verday, to send her ARCs to read before everyone else.
-That was a clever mention of my favorite author's name and still giving a great answer. As Simon would say, "You could win this thing."
My favorite kind of postcard, a pretty picture with the name of the place right on the front. From beautiful Lake Tahoe, which is between California and Nevada (Jess and I were there last year and loved it!) Briana M. tells us that if she had a magical power, it would be teleportation, then she'd use it to visit friends and go to cool events in other parts of the country without having to worry about how to get there or the cost of getting there.
-That's two for teleportation (three if you count Breia, who didn't use that word)! Sure beats hitch hiking, only did that once, I strongly suggest you avoid it at all costs.
Another ADD TO EDIT:

Samantha L. sent me one of my favorite kind of postcards. A cityscape from Chi-town. From Chicago, IL, Samantha says that if she had magical powers, she would go all out. She would have a flying carpet and a pet dragon that she would name, Buddy (the dragon, not the carpet). On one of her many magical trips, she would meet up with the Wizards of Waverly Place. Where she would fall in love with Justin Russo, and be incredibly happy with him. They'll fly all around the world on her magic carpet with Buddy, the dragon.
-Sounds like you've really thought this through. Nice job, Samantha.
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This one is from Celia L., a neighbor to the south, in a town we spent a lot of time in also, Atlanta, GA. Celia writes that if she had magical power she would find some way to serve humanity with it.
-not exactly the most specific, but a generous thought.
Shawna L., from Idaho Falls-in (surprise, surprise) Idaho says that if she had magical powers, she would heal all sickness.
-That's right up there with 'world peace.'
-Let's all hope Shawna gets magical powers. BTW, love that little purse and sticker you added to the back. +for creativity!
This one came all the way from Portland, OR. From RoseRed who says, if she had magical powers, she would astrally project herself, so that she could be invisibly dropping in (like a mouse in the corner [fly on the wall]) and hear what people talk about when she isn't present.
-Who hasn't wanted to do that? Good one.
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Casey W sent in a lovely postcard from Indianapolis, IN. And she says that if she had magical powers: she would want the power of teleportation. That way she could be able to go anywhere in the world with the snap of my fingers. Also, it would come in handy if ever she was in a bad situation, like being mugged.
-Fun and practical! Very thoughtful.
This postcard came in from New England, the beautiful mountain state of Vermont. Lizzy A. says that if she had magical powers, she would use it to solve crimes and help people.
ADD TO EDIT AGAIN!!

This card comes from Mandy K of Debary,Florida, who would use her [magical powers] to explore the world.
Shesten M Sent this card all the way from Phoenix Arizona! She says if she had magical powers, she'd save the planet and all of the endangered species!
-very noble.
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This may be the most original and creative postcard I received, from South Jersey, Casper, (my only known entry from my mySpace blog) writes, that if she had a magical power, she would want to be able to talk to animals, partially b/c it would make her job a ton easier.
-I've always wanted to be able to talk to animals. Especially when my babies are sick. It's so much harder when they can't tell you what ales them.
That's it for now, Hopefully more to come!!