I agree with the sentiment that the opening tune was better than the entire rest of the film. I saw the first ATHF episode when it aired and have been a huge fan ever since. I think some of the things they do with dialogue and character interaction are borderline genius. Shake is such an indentifiable character, and yet there has never been a character really of his style in the past. He makes perfect sense in portraying an attitude we all know and wittness now and then, and Dana Snyder has ridiculous control over inflection that you can pick apart tiny details of the way he says things and why that makes it so funny.
The issue with the movie, I think, is this: ATHF only works in 15 minute intevals because of the fact that they are less about plot development and more about establishing a very small, simple plot as almost a backdrop, and then working with the dialogue and character interactions for 15 minutes or so. You can sum up entire episodes in sentence fragments 'Shake loses his PDA', 'A lame monster lives in the attic'. So, trying to somehow contort this format into a whole movie resulted in what I expected it to result in - a few really funny moments of dialogue and character interactions, but a lot of useless plot development that was just a waste of time. If anyone knows the Sealab episode that is ALL dialogue over the one frame of sealab during a blackout, that's a perfect example of how something that can be hysterical over 15 mins could never work in movie format.
I think Season 5 has had a few oustanding episodes and is still right on par with the rest of the seasons. 'Bart Oats' and 'Ezekiel' are both right up there on my fav list. But I'm rambling at this point. Time for bed.