When I say "raiding" I generally mean PvE big game killing, such as dragons, gods and other hellish creatures.
That being said, I love, LOVE, PvP. So, I am certainly not opposed to playing on a PvP server if and when 1) there is interest in it, and 2) if it is fun in the context of Vanguard.
We wont know the answer to those questions for quite some time. If I had to choose right now (which luckilly, I dont), I would say that SV will be a PvE guild, simply because I know with 100% certainty that PvE will be fun. I suspect that the PvP will be fun, as well, but its less than 100% because, well, details arent out there yet.