Favorite X-Men Comic Run?

Mine is Astonishing X-men by Joss Whedon and John Cassaday. I have soft spots for the earlier Claremont/Byrne and Jim Lee stuff and came back to comics in the early 2000s with New X-men, which I also enjoyed. I appreciate a lot about the current Krakoan era, but just couldn't stick with any titles. What's your favorite run?