Well to answer some questions:
foxbat, yes I mean karate lessons, but the idea of getting together to beat each other up sounds fun

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afthermath, I only play sealed deck tournament wise (you buy one tournament pack and 2 boosters and make your deck out of that to play)
for the other tournament formats, you need loads of expensive cards and since I ain't spend all my money buying cards(or all my time trading my other expensive cards for the right ones), I aint got a deck that gives me equal chances on a tournament.
For the colors; I got decks in all colors and probably most combinations of colors.
my most competitive deck is pure blue and my latest decks (made from cards of the champions of chamigawa series) are a black, a white and a blue-red.