Iota Phi Theta or Alpha Phi Alpha. I am torn to make a definite choice over the other. What would put Iota in the front is that I admire how the men of Iota carry themselves and are diverse yet cut from the same cloth. (Hey, sounds like SGRho to me!
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Plus, they really do personify the motto: "Building A Tradition, Not Resting Upon One." I love that Iota makes it plain that their brotherhood is what you make it and bring to it, not what you others have built for you. (No other fraternity's motto says, "You better be glad we let you in!", but IPhiT's just makes a plain statement that I can embrace.