Suicide Kings is a great little movie that slips under some peoples radars.
Dark Blue is a great crime/police movie staring some great actors. And of course, The Godfather is a classic crime movie.
Blade Runner is a classic cyberpunk, and a sequel is going to be released soon.
Mad Max: Fury Road, or any of the Mad Max movies are great post apocalyptic movies.
For Drama Big Fish is a favourite for me, as is movies such as Trainspotting and With Honors.
For comic related movies, Deadpool is great for both action and a laugh, but I also love V for Vendetta and Watchmen and of course, The Dark Knight.
For Fantasy, The Lord of the Rings Series is top notch, but the Chronicles of Narnia's first two movies are decent as well.
For Sci-fi, the Star Wars and Star Trek movie series as great go to's. Of course, there are also classics like Back to the Future and The Terminator, not to mention the Alien Franchise, which seems to border between horror and action.
Christ, let us know that your interested in for genre and I can probable ramble off at least a few good movies.