[Hectic]

Would it "look" cool or good i dunno. But it definately could be effective in the right environment. Say mc botoms and cadpat top in an older cedar or pine forest where the ground and bottoms of the trees are tan/brown while the uppers would be green.
Often tan or brown bottoms and green tops are worn (back in the day) by scouts and snipers. Also white bottoms and gren/tan/brown tops in a winter woodland environment. If your going for effectiveness then i say use what works based on the area of play. If yer tryin to look ubertactileet then babypjke all the way (multicam that is) or go cadpat.
If you wanted to do the tan/green look id stick to one contries camo like cadpat arid and temperate mix or marpat mix with arid marpat or mc.