It's not a very diverse play environment... Everyone either has a bunch of creatures, or a deck filled with hate cards. It's not interesting when the available cards dictate that basically only two deck types are viable. I don't like black or red, try to avoid them. Too aggro.
My infinite turn deck is green blue. Green has some life gain, and I use polymorph enchantments with blue. Bounce might help, if I draw it. Maybe I should splash white for boardwipe... I'm building a whole new deck at that point though.