I'm always in third person. Although I think I'm gonna add project Nevada which gives your power armor helmets different visions so I might end up playing some first person.

If i want to play in third person I play one of the mass effect games where it's done better.

First. Lots of VATS during the first part of the game. Once my PC levels up though, I'll just do first with VATS when needed. Can't stand having to pump 30 bullets into someone to drop them. Breaks the immersion for me.