I like a good cross over between 2 books, but Marvel went WAY over board in the 80's & 90's. I enjoyed for the most part Fall of the Mutants, Inferno & Acts of Vengeance. Age of Apocalypse was actually pretty good too- but the summer Annual events were kind of a mess. There were titles I didn't collect so i wasn't getting the whole story for Evolutionary War & Atlantis Attacks. It was better when they did crossovers with 3 to 5 Annuals, but it was hit or miss. It worked well with the Spider-Man or X-Men titles since they were all contained in their own titles, but the results weren't always that good

The whole Onslaught/Heroes Reborn was the opening i was looking for to quit (new) comics all together