Who do you prefer more and who dealt with their lovelives better?
In my view, it was Dave, at least he took no for an answer (Unlike Cody during World Tour and to an extent Action) but you say "he tried to kill Sky!" well Sky handled the situation poorly (But she does have an excuse, she became physical attracted to him)
To use a video game metaphor, Cody was playing on medium/hard and got 45% while Dave was playing on easy (Dave's Gwen had a thing for him and his Sierra isn't crazy obssessed with him for now) and only got 6%