In my comedy history class tonight, F-bombing Roastmaster General Jeffrey Ross visited and told stories from his life and from his excellent book, I Only Roast the Ones I Love.
Speaking from his own experience with hardship, in his unexpectedly quiet and relaxed off-stage demeanor, he encouraged me that comedy doesn't need to rely mostly on negative experiences; tragedy is just one aspect of comedy and it doesn't have to dominate inspiration. It's about diversifying, mixing experiences, good and bad.
"You don't draw comics about comics, you draw comics about life." -- Jeffrey Ross
So now I gotta go live life. Great.