As an artist, I've been very lucky to work with some sympatico talents like Mr Milligan. His scripts were always a joy to read. The script to SKIN was a masterpiece.
My biggest nightmare would be an opening page written by a writer in about 2 minutes that says: "We open in downtown New York, it's rush hour, thousands of pedestrians are fleeing the assault of a dozen helicopter gun ships as an army of Skrulls blast buildings to smithereens and a legion of your favourite superheroes are flying in to do battle. In the background Galactus is eating the empire state building."
That one picture would take me a month to pencil and ink.
That's why I avoided working for the big two generally.