Believe it or not, there are rules for good storytelling. There are things that make for good stories and bad. There's a reason that Twilight is not considered by human culture to be a good book, and a reason that The Count of Monte Cristo is. Good and bad, within the context of culture, is objective, but fuzzily defined, because culture evolves over time. For instance, The Count of Monte Cristo was considered bad at one point because Dumas was of mixed heritage, and people were racist.
Now, like/dislike? That's a different matter. What you like or dislike is entirely subjective and would be impossible for me to prove in any way, shape, or form. I will not endeavor to prove that you like or dislike something, as it's ubsurd.
What's good or bad, is, however, fair game.
Well, then, because Dragon Age is generally accepted to be good storytelling... Wouldn't that make you wrong?