Judging from your watchlist i would go ahead and see some of the Hitchcock classics like Vertigo, Rear Window, Psycho and North by Northwest. Also 2001: A Space Odyssey (1968) by Stanley Kubrick is a must see.
Anyway with your film taste in mind im sure you would like Paul Verhoeven, here is 3 recommendable movies by him:
Robocop (1987):
Total Recall (1990)
Starship Troopers (1997)
I would really advise you to stay away from Fruitvale Station. One of the biggest movie turds of american indie movies in 2013.
As you are a filmstudent, i would advise you to look into some of the foreign film movements. It could be the French New Wave, Italian Neorealism or some of the more contemplative works of Tarkovsky and Béla Tarr.
If you like A Clockwork Orange, i would definitely recommend you The Funeral Parade of Roses from 1969 by Toshio Matsumoto, which btw is a better film imo. Some of the keyscenes in A Clockwork Orange is from that movie.
You could also try some of the monsters in filmmaking like:
Sátántangó (1994)
Shoah (1985)