It just has to be Seven Samurai, I can watch that film over and over again.
I also like Battle Royale (well, any film with Chiaki Kuriyama!) and perhaps because I watched Ringu before there was too much hype attached to it, I really enjoyed that.
I've only ever seen one Bollywood movie, Raja Hindustani, one night on Channel 4 ages ago, but it was really enjoyable - just lots & lots of fun.
Favourite European film probably Run Lola Run (enjoyed Open Your Eyes too, much better than Vanilla Sky), and can't let this post go by without mentioning City of God.
EDIT: Sorry, just need to mention a few more.. doing this has finally made me realise I prefer foreign language films:
A Tale of Two Sisters (beautiful film!)
Audition
Y tu Mama Tambien
Feng Shui (Final Destination-style silly Filipino horror)
All About Lily Chou-Chou
Spirited Away (can't get used to watching the dubbed version!)
Boiling Point