This is something I was thinking about earlier today but what is the series you all go back to no matter what is going on in other comics or in your personal lives?

For me its the original Roy Thomas INFINITY INC. This is a title I read at least 3 times a year and I still think a lot of it holds up today. I was wondering how many others were like this?

By yesteryear (which yes I know is a very indistinct time!) I think I'm talking about titles before the 1990s (or maybe its just the decade before you got into comics, I haven't really worked out the criteria....)