Oneaprilday, you sound a lot like me (I hope I don't sound too weird saing that). Everything is Illuminated, Coffee and Cigarettes and The Big Kahuna are all films I had at home recently. And you are very right to wonder why exactly you have The Big Kahuna - I turned it off and sent it back after about 20 minutes. It could have been interesting (3 men in a room together, different generations, different outlooks on life), but the characters were just not interesting enough to me, and I am not that much of a fan of Kevin Spacey and Danny DeVito.
I really enjoyed Everything is Illuminated, and parts of Coffee and Cigarettes are really great, too.