I think my male lead Jinwoo's personality greatly strays away from the way most male leads are written. He has no filter, but without making him the total bully jerk male lead cliche, because most of his thoughts aren't mean or cruel, and he never says things to tear people down or upset them.
He's as blunt about his likes as his dislikes, but both are just his honest way of expressing himself without intent to bother anyone. He also tends to find things other people would never think of strange or amusing.
He is neither extremely shy and self-conscious nor very suave. His way of speaking is rather unconventional, but most of the time he doesn't feel awkward about that fact.
He's also obsessed with princess stories/fairy tales, and not even slightly shy or ashamed of it.