Personally,

I love being ganked. I love being surprised. It allows me to gain experience on how to handle things, and it distracts me from the boring grind. I agree after a few times it can get annoying, ofcourse, but it shouldn't be too hard to avoid the ganker for a while if it goes out of hand. But PvP server all the way for me really. Even if it's for the odd chance of totally pwning the ganker. But even when I fail at that, it's distraction and experience.

But to each their own really.