Wow, I have only seen a few episodes from the first couple of seasons, but it sounds like the show hasn't changed much (which doesn't have to be a bad thing).

I always found it hilarious how frequently Clark turns evil. Out of the few episodes I have seen, I think he turned evil in three of them. I keep meaning to get around to watching more of it. Two of my friends are really big fans, one of them because he is a Superman nerd and thinks this is the greatest Superman TV show ever, and the other one because he is in love with Lana, Lois, and Supergirl and only watches the show to oggle (he is one of my younger friends).