I tried watching Oldboy recently, and I couldn't get further than about half-way through. Granted, I was watching the dubbed version and this was probably a fatal mistake (The voice acting was retardedly over the top, along with hammy dialogue), but it was just really weird, for seemingly no reason. I hear it gets pretty awesome as it goes on but I just couldn't drag myself to get through it, and this is coming from a guy whose favorite director is David Lynch.
On that note, you guys should check out some of his movies, if you haven't seen them. Blue Velvet is probably the most approachable, it won an Oscar the year it came out and made Dennis Hopper pretty goddamn infamous for a long time, and is just pretty damn good. Mulholland Drive is good too, that movie is an incredible shitstorm of mindfuck and brainrape. And if you want make yourself feel incredibly uncomfortable, watch Eraserhead.
On the slightly less surreal side, I really liked Sunshine, which was a scifi that came out a few years ago by Danny Boyle, the guy who directed 28 Days Later and Slumdog Millionaire (although I never did see that...). It's pretty badass, the Sun's all explodin' and shit, and it's all "HOLY SHIT SPACE" with a really cool soundtrack. Also, Unforgiven is probably the best western I've ever seen, and that's counting The Good, the Bad, and the Ugly. So you should check that shit out, if you're willing to put up with like like two hours of buildup to the most intense finale ever.