Here are my top 10 reasons:

Have you ever been annoyed by the banality of our current culture?
Have you ever wished for a portal to take you to another time, say 20s Bohemian Paris specifically?
If so, this could be the film for you!
9. You may have a billion reasons to criticize Woody Allen, but he celebrates everyone on his team equally. He shows this by listing the actors in alphabetical order. I noticed that in the late seventies & he still does it. Good on him!

7. To hear Cole Porter crooning his hommages to Paris like “I Love Paris” and “C’est Magnifique.” Ahhhhhh . . .

5. Hemingway & Fitzgerald - 'nuff said!
4. Was 'The Purple Rose of Cairo' one of your faves? If so, Allen's newest time machine may be right up your alley, or allée.
3. The enormously talented cast of bohemians in the film, with a special nod to:

2. Kathy Bates who plays straight-shooting mother hen to the artists Gertrude Stein. Brilliant casting!
Et, enfin -- the # 1 reason you should see the movie is:

From the opening postcard montage of the City of Lights it's clear that Khondji's sensual cinematography will easily whisk us away, not just to Paris, but to the nostalgic Paris that every writer & artist I know has fantasized about at one time or another - the Paris of cafes & jazz, of wine & absinthe, and especially of a place where artists could thrive!
Owen Wilson's character talks about how great living cities such as Paris eclipse manmade art today and how inspiring an environment CAN be when it is viewed as a work of art and not just a series of boxes that people inhabit.
I believe I may not be alone in that upon walking out of the theatre, I wished that I'd turn the corner to find the feel of cobblestone underfoot, a light mist on my cheek lit up by Parisian lampposts and backed by a twinkling Eiffel Tower or romantic bridge.
Ahh Paris - Je te reviens!
TartanFrog