found this nice little thread for the opportunity of my first post.
Some interesting films were already mentioned.
Here's my list of the best I've seen from 1990.

1. Close Up (Abbas Kiarostami / Iran)
2. The Reflecting Skin (Philip Ridley / UK, Canada)
3. Wild at Heart (David Lynch / USA)
4. Edward Scissorhands (Tim Burton / USA)
5. Dreams (Akira Kurosawa, Ishiro Honda / Japan, USA)
6. The Death of Stalinism in Bohemia (Jan Svankmajer / UK)
7. Dances with Wolves (Kevin Costner / USA)
8. Europa Europe (Agnieszka Holland / Germany, France, Poland)
9. Good Evening, Mr. Wallenberg (Kjell Grede / Sweden, Hungary, Norway)
10. Song of the Exile (Ann Hui / Hong Kong, Taiwan)