For me, it's gotta be Spectacular Spider-Man. That title had some really great runs. At times it focused more on Peter's personal life than Amazing, which was cool. Peter David envisioned it as a darker book, with most of the stories taking place at night and in the black costume, also a neat idea. And for awhile it was the monthly adventures of Spider-Man and Black Cat, which was a lot of fun. There were even some notable periods where it was superior to Amazing, mostly when JM DeMatteis was at the helm.
What do you guys think? If you could resurrect a cancelled Spidey book, which one would you pick? And don't say Amazing Spider-Man.