Darn, forgot the option for 'I didn't play them'. Sorry.

MGSV

The story suffered, but that gameplay was superlative!

MGS5 by a large margin. Outposts were surprisingly fun to clear and gave me an excuse to go Rambo 2-5 rather than Last Ten Minutes of Rambo 1. And driving across the plains of Africa with a puppy in the passenger seat and Kiefer Sutherland selling some of the shittiest dialogue in all of MGS (and that is saying a lot) was amazing

Contrast that with every single janky eastern european RPG I played in the 2000s without any of the heart. Don't get me wrong, dodge mechanics aside, Breath was a fun game. But it was like GTA5 in that I wish the world were about 5 times smaller and more hand crafted with fewer annoying mechanics that get in the way of the game.

I really liked MGSV, but it didn't do anything new & exciting or flip the the idea of an open world on its head like BotW did. Wanderlust is a huge thing for me, and rarely do games come along and actually pull it off, to the point where I can't stop thinking of the game when I'm not actively playing it. BotW gave me a sense of wonder and amazement with what could be around the next corner in a way I had not felt since vanilla World of Warcraft back in 2004.

I actually developed a slight post-game depression when I finished it after 120 hours, because I knew there wouldn't be another game to pull off that kind of wanderlust for years to come.

Conceptually, I thought MGS V was pretty fascinating, but it really didn't hold my interest in the long term. I think I ended up spending about 6-7 hours with it before I had my fill, whereas I spent well over 300 hours with Breath of the Wild barely even touching the story stuff and just enjoying exploring that world.

@doctordonkey: Actually, that's partially what disappointed me personally. Sometimes I want to jump back in to see if something will spark for me, but it just didn't when it comes to the exploration and sightseeing in BOTW. Not that I thought it was anywhere near bad, just that it didn't quite do as I was hoping it would. There was variety in the look of places, but what I was doing wasn't that interesting, it was a lot run here, climb that (maybe reaching the top), rinse and repeat. It just felt like a lot of busy work perhaps, where my thoughts were 'man, well here's another mountain to climb...' That said, I would probably(?) say I liked it more than what MGS 5 had to offer. MGS 5 was majorly disappointing in that respect because like the story, MGS has always, at least to me, had interesting locations like Shadow Moses.

I picked "both" but after giving it more thought probably MGS V. I would argue that it's a more flawed game than Breath of the Wild but regardless I found the mission design and controls to be unmatched to this day. Both games do things I wish more games would do and that's encourage experimentation. (as the OP said) I feel like big budget games are getting more and more scripted so it was nice to see such big franchises do something so different.

I can't pick, both are amazing. Zelda was such a breath of fresh air when it comes to open world games. The world they created was just magical to explore. On the other hand MGSV is one of the greatest playing action games ever. It's so smooth and slick.

If you held a gun to my head if probably say Zelda.

Hard choice, but BOTW is one of my favorite games ever while MGS5 is very good but ultimately stupid.

Mgsv but not for the open world. Both games had pretty shit open worlds but the gameplay in mgsv is significantly better than BOTW. Both games are solid though.

I played MGS5 for maybe an hour... I sort of just forgot about it. I plan to eventually go back. I beat BOTW and did a couple of extra things.

Man that's quite a question, honestly..

I feel better about liking Breath of the Wild because it's full of so much joy.

But I might have had more fun dicking around in the world of a game that I otherwise think is inferior..

Ground Zeroes and Yakuza 0. In terms of open world scale, I prefer mine to be small.

I loved both but Zelda is a top 5 of all time for me. Oddly enough, I didn't get into a lot of the experimentation of that game that so many other people lauded, I just loved the feeling of the world and exploring. I was going through some rough times when that came out and BotW was the one thing that could put me in a good mood at the time.