Fourtyrulz

I'm with Rdr4evr here, pretty much any great zombie/horror flick I can watch oodles of times without getting bored.

But in addition to those:
Saving Private Ryan
Saving Silverman (coincidence? )
Collateral
Bill&Teds Excellent Adventure/Bogus Journey
The Big Lebowski

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the·o·ry - a working hypothesis that is considered probable based on experimental evidence or factual or conceptual analysis and is accepted as a basis for experimentation.
faith - Belief that does not rest on logical proof or material evidence.
- Merriam-Webster's dictionary