As much as I want to vote on a lot of stories I've made it my rule not to vote on any. This is because when I started on Wattpad I never knew about it, and never did it. I just find it unfair for all the stories I could've voted on before I knew of the voting system (which was around 4-6 months after I signed up). And it never became a habit so I just don't. I do comment though, and when I like it, I say I like it.
:)