The one that hooked me the most while watching the first time was “ Before Sunrise", but it's not on my list of top 10 movies I seen, although Link later's amazing movie Boyhood does make the list.
Interesting would mean lots of things. I myself like character development rather than action stuff, so i would choose there will be blood over the Dark knight.
But here’s some movies that quite every one enjoys watching them:
Toy Story trilogy
Princess Mono noke, Spirited Away, and literally every Miyazaki movie
Before trilogy
A separation is the best foreign film you're likely to see from the past decade. For best fo regin films ever made you could definitely check out In gmar Bergman movies ( Persona is my favorite movie ever) , Akira Kurosawa movies ( Rashomon is my favorite movie of his), Michael Haneke from living directors( white Riboon and Amour) and of course As ghar Farhadi ( just check him out, thank me later)
Every one likes The Dark knight, so do I, probably not as much though, but Its very intresting.
I guess we could show some love to Disney itself right, with their best work to date Beauty and the Beast.
Talking of Pixar, we have Wall.e and Inside out and the amazing finding , the incredible ( I've mentioned Toy story already)
We could totally agree about movies like Silence of the Lambs, One flew over the cuckoo’s nest, The godfather (part 1 and 2) are all are intresting.
Another trilogy which I don't love the way others do, and in my opinion is so overrated, is Lord of the Rings, but you may find it interesting, as well as millions of people did.