I for one love Jimmy Fallon. He and Tina Fey in SNL was always my favorite Weekend Update. I was extatic when I heard he was the one who'd take over after Conan.
The show so far has been pretty funny, some things haven't been great but come on.. To dismiss the show after three episodes? Conan had like what.. 14 years?
Watch it if you like Jimmy Fallon, if not.. don't.
Of course he laughs during sketches, if he couldn't keep it together for the years in Snl, he can't now.