I don't know who Bonaduce is...but I already love him.
Sadly, after the show ended, Danny got into drugs. He cleaned himself up. Today he is a LA dj and appears on sitcoms from time to time
http://www.imdb.com/title/tt0065333/
If you never watched "The Partridge Family" on TV as a kid, you were clearly deprived ;-). Danny was, even then, one of the actors on that show that had a brain.