Just watched HTTYD live action and I have to say that I loved it. Yes, I know people are disappointed that it's a replica of the animation, but I don't know, I liked that. Watching a remake in live action kind of let me relive the magic that I experienced watching HTTYD the first time as a child, and I had chills and teared up countless of times. I simply loved it.
If the live aciton is different from the original, people complain, and if it is exactly the same, they complain. You can't satisfy everyone, but I loved it. You're allowed to feel otherwise. But I just have to say that I still have a smile on my face when I think about it, so I would recommend watching it. Live action gave more depth to the story, especially as an adult, it made it even more real, in a way. It fit me at least (but I do agree that nothing can beat the original).