Each one only uses a few cards, wins you the game (usually on the spot), and fits a pirate theme
(Remind me when Worldwake is public and I'll tell you about it.) One of things that is very subtle about planeswalkers is how we try to craft their abilities to match the kind of wizard each of them is
The most popular deck in the format right now is Rakdos Midrange, also commonly referred to as Rakdos Demons
You need to constantly evaluate board states and anticipate hate cards
For instance, if you switch a 2/4 creature's power and toughness and then give it +2/+0 later in the turn, it's a 4/4 creature, not a 6/2 creature
Spirit of the Labyrinth is a 2 mana 3/1 creature that locks players into only drawing a single card each turn, and Eidolon of Rhetoric is a 3 mana 1/4 creature that locks players into only playing a single spell each turn