I think I can handle like 3-4 open world games a year tops, with a bunch of linear games in between to clear my head.

The Witcher 3 would have been better if it had followed the structure of the first 2. I haven't played the first one but had a lot of fun with multiple playthroughs of The Witcher 2. The completely different paths is what I missed in The witcher 3, plus the story got drowned out by all the busy work. There were too many repetitive quests, too many things trying to distract you, too many crafting components, too many similar looking villages, too many similar looking npcs. It was all the open world stuff that dragged it down. I didn't really care for the story anymore after getting to Novigrad. Exploring the skellig isles was fun, yet there was zero pace to the story anymore and it just became part of the ever growing todo lists.
The story did return for me when I got back to Kaer Morhen. That was a good area for both exploration and story. After that it went downhill again unfortunately and I was glad when it was finally over. Although I enjoyed it at the time, It's not a game I'll ever consider replaying.

Many open world games feel more like a temporary addiction than actually enjoying an engrossing story. I like the well written sidequests and can't wait to see what fun things can be discoved in Fallout 4. I enjoyed the different story paths a lot in Fallout NV. Yet at the same time I'm already tired thinking of all the levelling up, looting, selling, crafting and now also town building that comes with it. When can these games mature and not rely on dopamine effects from watching numbers increase.

I love open world games, it's my favorite genre, my most anticipated game of this year and next year are also an Open World game, MGSV and Horizon Zero Dawn #4dawin!
Now the real question should be, are Open World games need Multiplayer ?

I'll let you know after I play Xenoblade X!!

Love open world & exploration.

More open world games are always better!

Its okay, as long as there aren't too many boring side-quests that drowns out the main story and I like doing side-quests.

The concept is great, but just because your world is big doesn't mean there's going to be a lot of stuff to do in it. If you're going to make an open-world then make it because it has to be open-world for your story or you are going to put a lot of detail and things to do with it, otherwise, you;re just doing it because of the hell of it.

I think open world games are the JRPGs of the 2010's. They're popular right now and everyone is playing them but eventually they'll become redundant and do little to change due to their nature. Nintendo claims to add a twist to this format with Zelda U so who knows, maybe it'll be different enough to warrant OW games even further. As of now, I don't like them very much. Sometimes I just want a deep and engrossed story and OW games rarely offer that.

Only bought one of them; The Witcher 3, and loved it to bits. Can't speak about the others but I am getting Fallout 4 day one.