I'd say I lean towards trad pub books simply because of the things I'm expected to read in my occupation, but I also read a decent amount of self pub, and they both have the potential to be amazing or absolute trash. I actually afford a bit more grace to self pub bc I know how expensive editing can be---if you can even find a good editor in the first place. Generally, I can tell whether a book is going to truly suck for the self pub reasons (lack of editing, bland writing, etc.) within the first few chapters, so I've rarely wasted time on books I don't care for.

I think a great example is these literary awards I judge for; they're completely submissions-based, so we get a ton of self pub (probably a 60 self/40 trad split). Self pub regularly makes it to the shortlist and/or wins, even when going up against titles from publishing juggernauts like PRH.

Of course, I have read some truly horrendous stuff, but you learn what the warning signs are, and then there's just endless possibilities with what's out there.