If you like eastern action then Seven Samurai is a must see, I would also recommend The Warrior. Any film by Kurosawa or featuring Toshiro Mifune demands a viewing. If fantasy is your thing then Fellowship Of The Ring extended version, it's the only one worthy of bearing the name of the book. Any western featuring Clint Eastwood guarantees satisfaction.

Having dabbled in spooky films I'd say Ring, Dark Water, Grudge 1&2, Phone, Tale Of Two Sisters etc are worth watching. Another film I used to have and enjoyed watching was Carlito's Way, an ex gangster trying to stay clean but getting drawn back to the old ways.