I always sew hems by hand! My sewing machine does the most disgusting topstitching (OK, the fault might be on my part) and I don't like using the blind-hem foot.
I used to have someone else mark my hems for me, but then I got a dressmaker's dummy and a hem-marker and have never looked back. I can do it on my own now, and it is such a relief. I feel like such a goober having someone else mark my hem, because I end up trying to give directions while holding perfectly still.