Like many my age, my cinematic discovery of Michael Keaton was the same as my cinematic discovery of Tim Burton (well, it was actually Batman Returns before Batman.) The third for each would end up being Beetlejuice.
As a kid, it took me a lot of convincing that the guy behind the Batman mask was the same playing the bio exorcist. Still, it was a near perfect introduction to the mind of Tim Burton (I did not get to Pee Wee until later in life), as it made me aware at a young age directors could have there own sense of style.
Nothing else to say 