Here are some stupid ones:

Every Batista Spear make me go holy shit (so very poor)
A pay-per-view in which Undertaker doesn't return from the dead.
A match John Cena doesn't win.
A match in which Carlito is not buried.
Any time anyone from Toronto cheers John Cena
How much Bobby Lashley is over.
Any Hornswoggle match (not good thing)
A good WWE/ECW match

Serious ones now:

The obvious deaths of Eddie, Benoit and family, and Owen Hart
Purchase of WCW
Austin/Rock/McMahon Beer Truck (The Rock sold like no other)
Kurt Angle battle rap Cena (just awful) (wonder why he left to TNA? )
Any TLC Match
Any Sabu old ECW Match
Montreal Screwjob

Probably forgot some but there we are