I found the movie version of The Fault in Our Stars funnier than the book. And just as sad. But definitely laugh-quietly-to-myself funny, which I didn't expect. Isaac (Nat Wolff, of The Naked Brothers Band) has perfect comedic timing, while Augustus (Ansel Elgort) isn't afraid to throw himself under the bus for a laugh. Hazel (Shailene Woodley) plays the straight man to her two friends (ahem, sorry, friend and boyfriend), but has enough snark and sarcasm to hold her own.
The plot doesn't change from the book, and a lot of the dialogue remains intact, so the story holds up in the film genre. The actors give life to characters that already seemed real, and [SPOILER] the Van Houton appearance at the end somehow seems natural (not contrived, like it did in the book). That fact itself endears me more to the movie, but John Green's prose still holds up. (So let's just call it a tie. Or, you know, me liking a story told two different ways.)