magic the gathering trading card game

i used to play a 'pure green' deck, focusing on teeny weeny creatures (mana-producing elves) on early turns, then casting titans at later turns. i also played a 'pure black' animator/zombie deck, which focus on summoning zombie armies and giants. later i tried combining those two different themed colors, and what i got is a theme of re-animating (through black spells) pure-muscle monsters (green creatures)! for me, it's the best combination of (contrast) colors, BLACK and GREEN :)

for me, I would have to go for black and red, as I like aggressive decks and decks that just breakthrough and kill, kill, kill. How about you, what is your best combination?