My favorite character was definitely Herr Flick - true villain fear and square! After Hans left, the show was not as good as before, but when they brought another guy to play Herr Flick, it ultimately went downhill, and no wonder that they ended it soon after that.
To end discussion about Hans (if there was any) - when everybody say "Heil Hitler he says "'Tler" because he is lasy to say the entire phrase. I know this cuz I checked on "Cafe Rene" website, and they air the show with subtitles in my country so I read.