Glass is a great protector for prints hung on the wall, but does not show the prints at their best, I think. I use it, but consider it a compromise. I like to see the surface of the print, but glass gets in the way. Of course, some glass is better than others. I would like to hear people's experience with different glass types.
I worked with a photographer who had a great method of display. In addition to prints behind glass up on the wall, he had a leather bound book with handmade pages. Each page had a tipped in photograph. When he handed the book to a viewer, he asked them to wear a pair of white gloves, which kept off fingerprints, and also conveyed that he was letting them see something he cared about preserving. Viewing prints this way made for an intimate experience.
I have heard that Wynn Bullock and guests sat in a darkened room, before an easel holding one mounted print at a time, which was illuminated by spotlight.
Just two ideas.