Hmmm, the interstellar argument. It's a tough one. It's unique. Definitely worth a watch. Paradoxically, to me it's one of those films you'd watch once and never again. You've been there, done it, worn the metaphorical t-shirt.
Other, more story-bound, lesser known Nolan works like the Prestige stand the test of time and can be watched repeatedly.
I'll probably be shot down for saying that (Gets bullet proof armour ready)