>> Color-changing, or otherwise being able to affect one's outward appearance at will, is another popular thing to wish for. <<

I'm a shapeshifter by nature. Even morphlocked, it comes through. Sometimes the results are amusing. The canine tail-wagging telegraphs to my butt when I'm happy, but the feline tail-flicking telegraphs to my foot when I'm annoyed. Same appendage, but different moods, and then different analogs in human form.