For me, having only recently gotten into collecting graded comics, so far it is 9.8 Spawn #9, written by Neil Gaiman & signed by Todd McFarlane:
Reasons:
Spawn toys were my favorite things to collect growing up (Spawn comics not so much)
My sister's name is Angela! (she makes first appearance)
Todd McFarlane is one of my idols, but only for his creative prowess as he was quite vicious as a businessman, going against his original creed for starting Image (preserv