GamePress
Is PVP a big deal to you?
It isn't for me. I really won't play it. I mostly play alone while walking, and only know 4 people who I very occasionally will go attack a gym with.
As far as I'm concerned, PVP will be just a bunch of random requests from strangers wanting to 'prove' themselves. I've played enough MMORPG to know that it is just a constant pain. I hope that, when Niantic puts it in game, they have an option for individuals to turn it off and opt out so that requests don't even occur.