Why does Harold visit funerals?
I understand that Harold is obsessed with death. And, it seems his fixation is tied to his desire to be noticed. (He discusses with Maude the moment his mom was convinced he died.) To Harold, death may be a way to get people to care.
So, if attention and concern are his reasons for being interested in death, why does he go to the funerals? It would make sense to me if he found death, itself, interesting, and goes to funerals to observe that state. But, that is not the case from what I see. Also, Maude teaches him the importance of recognizing individuality, when pointing out the differences between daisies. Since Harold learns to appreciate the beauty of each person later on in the movie, I do not think he visits funerals out of respect for the person who has passed away.