What was he like before he became, you know, just Jim Carrey? Cause before his recent flirtations with more serious films, he's been pretty much the same character in every film, non?

I'm watching Ace Ventura at the moment, which I'm enjoying, but would probably have liked it more if I didn't know about the seeming millions of similar films he's done since.

What was his first proper film anyway, Dumb&Dumber?