It took me a long time to warm up to his Fantastic four, especially around the one off issues, like the Inhumans one with the multiple wives. I was very confused.
Also Johnny's death fell very flat for me, but when it all started ramping up in the second half I've enjoyed it much more.
His Avengers on the other hand just felt grand from the get go and kept escalating and just felt like bigger, bolder and more significant than any other event. And when it ended I remember thinking "that's it, I don't need to read any other Avengers books ever again".
(ps: this is coming from someone who much prefers self contained stories that long running superhero continuities, despite growing up with those).