For some reason, I have a cutoff to my interest in going back and reading older story arcs or issues that are recommended to me. I feel my cutoff is the early 90s which is how "recent" I'll go with tracking down the old issues and reading them. If someone recommends something that is newer than the early 90s, my interest seems to fall off.
I'm not sure why that is. Maybe it feel pre-internet comic book days seem more special, that it represents a time where the community of comic lovers was smaller and less assessable. Maybe the pre-speculator era seems more special because it was a time before variant covers, gimmicks, and creators that had rock star status?
I don't know what it is, but if you tell me about an amazing series to check out that ran in '87-89, or one that ran from 2002-2005, I'll naturally gravitate towards the older recommendation.