I can pretty much sum my thoughts about Borat in three letters: WTF?
No, I don’t have HBO, so no, I’ve never seen Da Ali G Show. The most exposure I’ve had to Sacha Baron Cohen was his appearance in Madonna’s video for "Music", and my reaction back then was, "Who the fuck is that clown?"
So, no, I don’t know what I was expecting when I went to see Borat. It’s the first non-horror movie I watched where I was ready to cover my eyes at a moment’s notice.