1: I play a lot of Pioneer (because it encapsulates basically every set I played) and Commander because it's what everybody plays. However, I've recently been enjoying Pauper more. The People's Format.
2: Arcades, The Strategist + A Fuckload of Defenders + Tower Defense
Alternately, any Lotus Field Combo.
1: All my decks are sorta vanilla. I guess the weirdest would be my Turbofog pauper deck
2: Friend of mine has a Commander deck built around voting and giving himself extra votes. He calls it "Democracy Manifest."
3: I want to make a Commander deck with an abstract theme, and then I found out the artist behind a lot of cards in Boros colors is named Zoltan Boros. It'd ultimately be a Brion Stoutarm Fling deck, which I also want to make, but if I make Boros by Boros, I can kill 2 birds with one stone.