I prefer lower-heeled shoes b/c of my chronic low back pain. But it's really, really hard to land flat foot or heel slightly first (like my PT guy is trying to train me to do) with less heel-toe drop. THAT makes my calves tight.
I prefer a midfoot strike, but he thinks that is causing some other problems, so I am being obedient and doing what he wants for the time being. I went from being able to run 10-13 miles to being able to run about 1 with good form.

