When it comes to comics and all the different writers, you clearly end up with tons of different continuities / stories.
So, for your favorite characters, what defines your canon? Such as backstory & motivations. Do you stick with what was written first and dismiss later contradictions as retcons? Do you change with the writers and go with what was most recently said? Or do ya just pick and chose at random with whatever you feel is best?
Share your canon for your favorites. What stories & characterizations did you like best? And what retcons, or plain changes, do you hate & subsequently ignore?