Favorite for me is an easy choice
I know the variant gets more love, but this one represents the era I first discovered the character.
My first published artwork was when I won a contest for drawing (copying) a Sal Buscema Hulk head that looked remarkably close to the head here.
I was seriously happy with the classic action Wasp too. Both these work so well displayed together- with a great contrast in size as well as colors.