I'm pretty certain that Dave, Nick, Bob and John suffered from depression.
I think John Stewart once said that after he started taking anti depressants...his voice changed.
I go through anti depressant exercises.
Usually,I go to YouTube to find something that will cheer me up.
Often, it's a cooking show.
Very often... it's music.
upbeat Music works better than anything for me.
Yesterday ... I discovered that all of the Ray Conniff albums are on Napster.
For $10 a month, on Napster, which is the successor to Rhapsody you can listen to just about any album you want to hear.
At one time, all of the Sinatra albums were there. Many are missing now, or have been combined. Boy, do I hate that.
If you speak Spanish...you'll enjoy what Ray Coniff tells his audience on this video....
Watch it and you'll be happy in no time