So I just re-cataloged my collection to try and downsize. I ended up with two extra shelves of empty space (every collector's weakness ).

While I should be happy with the free space and use it for future releases, I got to thinking about some popular titles I never bothered to collect.

Specifically Sandman & Watchmen. Due to the fact that they usually appear on every "best of" list, I figured I should own them.

Are these two titles essential & a must for every comic enthusiast's collection? Are there other titles out there that people feel should be in everyone's collection?

Now obviously people have their own preferences & opinions. But I think we can agree some of these titles have reached entirely different levels of success and notoriety that breakthrough the limited world of comics and into the mainstream.

What do others think?