Do share, why don't you use them? And I'd rather have more specific reason than "I don't like them" (which is a valid reason ofcourse), because I'm curious why don't you like them.
Thank you!
EDIT: Typo, and thank you for feedback. :p
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There are large open areas in most pve maps, and getting into shotgun range usually means you're going to be shot down by a mob. This is not the case in PvP. There are doors, corners, ledges, crates or large rocks every ten feet in PvP maps. And shotguns can get one shot kills at almost twice that range against other players.