Adult Pete. Up until recently we have almost been getting exclusively teenage adaptations. I think too much ground is being retread at this point, to the extreme where writers will take recent ASM stories and adapt them into a high school setting in a cartoon. I love the Lee/Ditko era and Ultimate Spider-Man, but you can only do so much when your main character is stuck in high school. Also as other people are saying, adult Pete has a much better supporting cast. I also like when Peter is one of the more experienced heroes.