As I don't have kids yet I haven't really looked in the reasons for not vaccinating.

However as someone with an (almost) PhD in microbiology, the knowledge I have of the diseases is pretty much enough to make me choose to vaccinate, especially considering the risk of re-emergence of diseases previously vaccinated for.

That said, when the time arises, I will take the time to research the "don't vaccinate" side of things and make my decision then.