I don't have any use for ants, or grasshoppers. Who would create such miscreants anyway? But if I was forced to choose between them, I much prefer grasshoppers. At least they don't find their way into my house and try to run off with my food. A few hoppers bouncing around outdoors gives the cats and birds something to do, but yeah, I understand that grasshoppers can be a very bad thing in large numbers.
I've been dealing with some itty bitty little ants in the kitchen for the past couple of days, so I'm not feeling any sympathy for those little creatures at all.