I read x-men comics when I was younger, but once I stopped I never managed to get the emotional or intellectual pull back to any other comics. I've checked a few out when I was older, but besides Watchmen I didn't feel an interest or connection to anything I read. The only thing that I get from any book I've checked out was interest in the artwork. I seem to not be able to care about the characters or become engaged by the plot. :/
I still get interested in what's out there though so thanks for this list.
I think it's important to a draw a distinction between comic (which are mostly serial) and graphic novels (which are mostly contained). On occasion I revisit some of the older ones and my fascination hasn't faded yet, I do need to be in the right mood though. I think V for Vendetta is another good one if you like the more rebellious stuff (and the artwork is amaze) :)
I do love Xmen too, but I prefer the more noir Wolverine stories :)