Depends on what I'm doing:
First Person:
Third Person:
Generally, the harder to negotiate and environment is, the more likely I'll be in third person. This is probably because my formative years of gaming were spent playing Zelda and I got a lot of practice balancing on ropes that way. ;)
First person. I hate the zoomed in over the shoulder third person that blocks your view of the left side of the screen in this game. At the very beginning of the game it is zoomed out and just slightly over the shoulder (so I stay in third person until I get the dragonstone), if they had kept that perspective I would always play in third person.
Well I have it for console and PC. For console I definitely use first person, but for PC I like to keep switching it up. Same as most it seems, archery 1st person, melee 3rd person. for exploring I prefer 3rd person however just because of some of the mods I use it looks better, small cutscenes and such, being able to see footprints, etc,