I always liked this show when it originally aired.  Bob Newhart is at his best playing a low-key everyman that quietly reacts to all the lunacy that surrounds him.  In this series he plays a psychologist which is a creative way of introducing some quirky characters for him to respond to (not that his friends and co-workers aren't quirky enough themselves).  The show ran out of steam the last couple of seasons when supposedly Newhart wanted to end the series but was talked into staying. It is still a fun show with a lot of good memories.