3M Command strips are good. However, I have found that when left on the wall for an extended period of time (as little as a month), the removable function seems to go away. Trying to remove the strip can actually cause extensive damage to the wall surface...this happended to me when hanging Xmas decorations for just the month of December a few years ago.
For most of our Scroll Saw Portraits, even when in a frame, they are very light. I use the very small sawtooth hangers on the back of my work and use very tiny small headed brass nails to hang my work. The hole that remains when removed is very tiny, almost invisible and easily filled with the smallest dab of spackle if and when necessary.
If you are displaying your work in your living room, they will probably be there a long time...not sure, IMHO, I would use any kind of adheisive hanger.