To me, Velveeta is the best, but don't get that premade one, it's not as good as homemade.
To make it, boil your favorite kind of noodles, drain it, chop up Velveeta cheese into small squares (preferably before you boil, just stick them in the fridge until you need them). Once they are drained, have the stove turned off so you don't burn the noodles. Put the noodles in the pot again, hurry and put the cheese in and some milk. Depending on how creamy you want it, just add a little or a lot, no need to measure. Stir until all the cheese is melted and serve!
I'm actually having a bowl of it right now....i could have put a little more cheese in it though, oh well! XD