Help with those Surprise Endings

With two major series, Ashes to Ashes and Lost, finishing this week, and leaving many viewers underwhelmed by their big twist finales, I'd like to save you from future disappointment by pointing out that there are really only 3 twists. (Spoilers ahead, obviously.) There are incidental twists that arise out of the characters and are genuinely surprising (The Crying Game; Star Wars), but if an ending has to explain everything, don't get your hopes up: it's almost bound to be one of these.
1) The narrator done it. The unreliable narrator has been around since Wuthering Heights and before, but still most people's heads explode when they come across the idea that HE'S MAKING IT ALL UP. He is Tyler Durden/Keyser Soze/the murderer! Etc. Did provide the only satisfactory Agatha Christie plot there is.
2) It was all a dream. Strictly speaking banned from all stories by people over the age of seven but it still sneaks in. Only David Lynch should be allowed to do this.
3) They're all dead. Hard to believe this could still be considered a surprise when it's been used in everything from No Exit to The Third Policeman but since every TV series ending recently seems to unveil this as their Big Explanation, obviously it is to someone. I expect the last episode of Mad Men to reveal that Don Draper was actually killed at the Battle of Gettysburg and was sent into Sixties advertising as Purgatory.



