Es from milgram has been my favourite character for like. 2 years straight now. Second would be The Hunter from Bloodborne (and while they're not a character, but a concept/MC, I enjoy them nonetheless) and third would be Silver from Pokemon I think.

I have always seen myself in Es and that's mostly why I like him so much....I have an Es itabag and my wife bought me the t2 plushie 😊 I enjoy all of the Es even in the manga. I just Love Es (collectively)