Ryyoku of the Night
The other Most annoying decks I've faced are the Gladiator Beasts and E-Heroes, UUGGHH!!! burning_eyes E-Heros aren't so bad. You forgot to list Monarchs, Lightsworn, Blackwings, Dad Armed Dragon and Red Eyes Black Metal Dragon decks. I'm surpsised nobody has actually mentioned them. They make the metagame so boring. I was at the local tounrey and it had something like 10 people and 4 of them had Blackwings and it's always the same people that win. I swear less people have been coming to the tourney because of the top players always copying eachother with only minor changes to suit their own dueling style. Two years ago we would have had at least 20 people coming. Now we're lucky to get 10.
the trouble with many of the top players is that their arrogant if their winning but have a trantrum if you gain the upper had using a deck of rejected cards.