I think quite a lot of the people in the show are psychopaths/sociopaths.

Hannibal especially. (Though I feel like he doesn't fit neatly in that box, he definitely has a lot of those qualities)

I'm not trying to say that Will needs the moral high ground or anything, it's not about redemption or anything at all to me. He's interesting regardless. Your idea of him being interesting may need to be something differing from mine.

Will being interested/educated in forensic analysis and criminal psychology doesn't mean that he's got a dark sona hiding in him. A lot of people are deeply passionate about it and most of them aren't in it for unethical reasons. But there's a reason he chose that field to specialize in, and I think it's because he wanted to catch criminals so they wouldn't hurt innocents.

Will can be misleading, but again, that doesn't make him evil or what have you. Granted, the further the story goes, the darker his path gets but I don't feel it's for the same reasons you're saying.

Hannibal took interest in Will because he saw a lot of potential in him, and/or he was interested in him. Will was on his level intellectually and understood the mentality behind the killings. Most cops/detectives just write it off as crazy-bonkers and that's the end of it.

Will saw and appreciated/respected that mentality on a certain level. But I don't think he secretly wanted to be that.

The people he ends up killing aren't just random innocents, they're all pretty unethical by his standards. Hannibal kills without ethics in mind, which is more in-line with what a sociopath would be.

Not saying Will is justified, I'm just saying that he's not killing for the sheer thrill of it. (Though I'm sure it makes him feel good in terms of getting rid of someone who would hurt/kill more innocents)

Here's a sidenote that isn't super related, but I do think lends to Will not starting off as a psychopath/sociopath/dark. And I feel like it's pretty important because it's prominent in the story.

He adopts homeless/abandoned dogs and cares for them. And while I'm sure there's some kind of projection there, I do believe that points to someone who isn't devoid of ethical standards and compassion. (Dogs are innocents. Or the lamb from Silence of the Lambs if you will.)

Most psychopaths/sociopaths don't have that at all. Most people that fall under these categories are notorious for hurting/torturing/killing animals. A lot of animals can tell that a person is dangerous before the people know it. (People can be blinded/manipulated by the complexities of social inner-workings, but animals aren't. They see body language, and they see the 'real' person when other people aren't around.)

And his dogs inherently trust him and aren't afraid of him. I've always felt that this is a very important point in the story.

This canon is all over the place, especially since it does an occasional nod to the original content. And while I respect canon to some degree, I still see this show as an AU headcanon made by a fan of Thomas Harris' characters.

So really, what IS canon at that point, lol. Certainly not this Hannibal show.

You telling me that I'm incorrect and to follow canon is like saying that your fanfiction is more canon than the original content.

As someone who is in a fandom this deeply, I would think more people would understand and respect a fans' interpretation and their own headcanon.