There seem to be a variety of different reactions, many that you listed.
When I saw the shirts, I didn't have an emotional reaction to them, I wanted to see them "in the flesh" after seeing them in the movie.
I remember a gathering in LA where Diana Ossana was a guest speaker. She took time afterwards to talk to the Brokies, and BayCityJohn was there, wearing his shirt that he got off ebay, that Heath had worn in the movie.
While John was talking to Diana, he mentioned the shirt, and she recognized it, and had not seen it since filming. An expression of awe/joy came over her face, and she reached out ran her hand down John's arm.