But what if it's something you can't really express with words? Like, if something looks weird I can't necessarily just delete it on sight giving "it looks weird" as a proper reason. In that case, I let it go four days.

Sometimes things just don't look right or good. Sometimes I personally don't know how to express what makes it bad. A lot of the cases have to do with that simple fact. I don't know how to word it well enough to where it sounds valid.