The movie was great! But, I have to admit, of the 10 times I've seen it, I was sober only once. That was the last time I watched it. I don't know if the high was making everything funnier or by that time I was getting tired of it. Either way, it's a great flick.
You really need to check out his series "Da Ali G Show". If you think Borat is stupid, you'll love his character Ali G. My fave line from his first season was when he was interviewing Newt Gingrich. They were discussing the war in Iraq and WMAs. Ali G told Gingrich (in his sexy British accent), "Isn't it stupid to go to war over a sandwich?" I laughed so hard that a little bit of pee came out.