Blue forever! Even if I'm not playing mono blue, there is almost always blue in my deck. None of the other colors are weird and annoying enough. The only other color combo I really go for is Black/Green, though I could see myself making a Black/White deck under the right circumstances. Though I must add a disclaimer that I haven't actively played in years. I don't think the color identities have shifted that much, though.
I’m that awful person who is happiest when I am constantly tanking/healing your hits and bouncing your attacks and then locking down any tricks you have so you’re stuck hitting me directly, which I then heal.