How would the shrines look in Skyrim?,In Morrowind they where ancient Daedric site like ruins, And in Oblivion they where open statue like shrines, Has Skyrim's population be known for its deadric dealings with the prince's? In a religious like manner akin to Morrowind?.

For some reason I imagine them being hidden up in the mountains like Azura's shrine in Morrowind.

I'd love that, Finding an ancient ruin in the mountains and searching it for the shrine! I'd want that kind of thing, i'd like a little challenge to finding them and the mountains can give that challenge.

I think there should be interiors to the shrines, it gets cold up in Skyrim and NPCs hanging out in the open 24/7 seems silly.

Agreed. Though deadric shrines that all look alike, similar to the aylied ruins but with a different color scheme, would not really be a good solution either.

Boethia's shrine is Morrowind was thrilling to find for the first time. More secrets/secret locations in general would be awesome. I'v also always been partial to the idea of the Deadric princes being summoned by their followers on their respective summoning days; imagine stumbling across that!