My favourite is Green Lantern, I love all stories from that series as well as the others like Green Lantern Corps etc.
My specific favourite storylines are The Sinestro Corps War, Blackest Night and War of the Green Lanterns.
I also love X-men, specific stories for me that are faves are Dark Phoenix, Age of Apocolypse and Avengers vs X-men.

Yep, I love the concept of other people assuming the mantle of the Green Goblin apart from Norman Osborn. He never needed to come back.

Loved Alan Moore's Green Lantern Corps but Green Lantern was actually ruined for me when I read the original comics... daft and kinda dull