I think I read more online stuff than paperback things, except the Bible. I prefer to have a physical copy of the Bible in my hands rather than read it online. Though, I read it online also when I'm studying.
So, I guess my answer would have to be, it depends! If it's a Bible, then paperback! But, pretty much everything else - online!
Chocolate or vanilla? (or another flavor?). I like a combination of both chocolate and vanilla when it comes to ice cream. Have you ever had moose tracks ice cream? It has vanilla, fudge, and peanut butter cups. It's pretty good.