Conversation so far:
What was Phil Hartman's style?
his real-life personality, which was described as "a regular guy and, by all accounts, one of show business' most low-key, decent people".
and what was his show style?
Hartman often played seedy, vain or unpleasant characters as well as comedic villains.
what shows did he act in?
SNL.
did he act in movies?
CANNOTANSWER.

Question: what did critics have to say about his style?
Self-contained rewrite: what did critics have to say about Phil Hartman's style?