Oh well.. thinking that Walter's clumsy personality, I bet some people will get annoyed by that. (Almost same as me, I always forget things)
For me after going lots of VN, I can say that the MC can't be too confident of itself. It will ruin the mood for sure.
Walter, he's a homeschool boy. He knows too little about the outside world. Can't blame him tho.
Mark? Evil smirk? Don't think so...