Okay what started out as a response that was slightly too long for a Tumblr ask turned into several thousands of words of character analysis that gets progressively more emotional and less coherent as it does on, but I think this does a pretty good job of explaining why Jace is my favorite character.
There are a lot of people who hate Jace because they’ve only seen early Flavor Text Jace and have a third or fourth-hand knowledge of Magic Story, so they think he’s only a smartass jerk who thinks he’s better than other people and destroys minds without hesitation. But there are also a lot of people who like Jace because they’ve basically only read Ixalan block, so they think that Flavor Text Jace was always wrong and that Jace is actually a soft little cinnamon roll baby who has never done anything wrong. These are both incorrect.