Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I want to say that there are whole cultures that are made around making the death of somebody as happy as possible, celebrating what they did in life instead of mourning their death. You're completely justified in making a death optimistic or neutral in nature; not everyone responds to it the same way.
Which one would you rather read: well-written prose about the basic "slay the dragon" scenario with equally basic characters or more questionable prose with dynamic characters and dragon language learning for the masses? It's an opinion, of course, but you get the idea. It depends, what do you want?
This is a good inquiry, though I wonder if it can be done. I'm thinking of some of the most thrilling series I know, and all of them have some humor sprinkled in. However, it's not to say that leaving humor out isn't possible, but you might find it difficult.