I've picked up all the Silver and Bronze Age books so far.  A couple of them I only picked up because I could get them at a greatly reduced price and probably wouldn't have bothered otherwise - X-Men volumes 7 and 8 and Inhumans volume 2 I'm looking at you! 

Every book from that Era has now passed the imaginary line in the sand that was originally my preferred stopping point, though there are some titles that I probably won't pick due to lack of interest/connection to the character(s).  That said, I'm surprised at how much I've enjoyed the Hulk MMW's, considering he's never been a favourite character of mine.