Oat milk tastes great and it's good for you, for the most part. The problem with oat milk is, they add a bunch of oil to it. they say it's just 2%, but I think thats by volume or mass. if they go by it's actual proportion (by calories), its nearly 25%!
Almond milk is great for you, but it doesn't taste as good as real almonds, so why drink it?
Soymilk is the one I really like but they add a bunch of stuff to it like calcium carbonate, which really didn't need in the first place. you can find soymilk with nothing added to it, but you really got a go to one of those specialty shops.
Personally, I like to make homemade quinoa milk, it's pretty good and you can adjust how much thickness you want based on the ratio of water. it's easy to make.