I agree that some performers take themselves too seriously, and it can be hard work for an audience to sit through a long set of similar, depressing songs.

That's not to say that everyone has to sing comic songs with choruses for the audience to join in. There's a place for all types of music, but in my view the key is a variety of material. I try to ring the changes, and include 'funny' songs as well as 'serious' ones. You can enjoy listening to a song with a 'miserable' or 'depressing' story, if it's performed well.

Overall I agree, folk should be enjoyable. If it's not, then people won't turn up to see you again.