I prefer things to be left untouched, but the thing is, a lot of the minor errors corrected for blu ray are things that would actually be significantly more visible on blu ray than they were in theaters decades ago. Blu-ray is not an exact replication of the theatrical experience. The marks on the window in Aliens is something that I’ve never noticed, and would never have known about if I hadn’t been told, and are also genuinely something that were not meant to be in the movie. Would I prefer that they weren’t deleted? I guess, but do I care? No.