I think he was a very talented actor when he played serious. His "funny" routine was too clowny for my liking. (Except as The Genie! He rocked that role.) I think he tried to break out of the pigeon hole after Jim Carrey did, releasing a series of films that took a more serious tone. Unfortunately they were all strangely depressing and dark and therefore were very hit and miss, with the majority being misses. ("Jack" anybody?)
Trying to follow Jim Carrey's career path and failing at it might depress anyone.
I thought he was great in World's Greatest Dad. And I will always remember him fondly for Mrs. Doubtfire, which allowed for him to flex his wings in both the dramatic and comedic directions.
Peace Robin... I shall smoke several vaporizer loads in your honor.