You seem to be assuming that there are two different types of character in this here universe.
- Your characters which don't take anything seriously (which aren't very accurate I might add, because I literally live my life this way, no one is outwardly funny all the time, though I don't dislike them, I just think their motives are going to be hard to define because in reality, only people with a certain edge would survive in this universe.)
-UBA SURIOUS BATTLE MONSTEZ WIT NO MOTIONS
That's just not true, try taking a gander at some of my characters and their back-stories, they all have incredibly poignant reasons for what they do and how they act. You'll find the same with most of the characters here, they don't have to be comic relief or serious war masters to make good characters, but if you expect people to want to interact with you then a balance is required.
Probably coherent, yeah, sure.