I'll have to put my two cents in with this one.
Armor Games has probably been the only reason I can still do Flash games, and probably the only reason I am still in school. They have supported me by funding my tuition for college, which I pay for on my own. They also started sponsoring my games when they were not that good, and checking in to see how I was doing from time to time. The general concern expressed from the people who run Armor Games is unmistakenly caring, which I find is hard to come by in this day and age.
They have paid me on time, and even ahead of time for some projects. They cut checks in any way I need it, whether it is over paypal or by mail. They really make a good effort to make sure everything is streamlined. Its nice to know that there are people out there who are willing to support the flash community so much.
I cannot speak for Crazy Monkey Games or any other Flash sponsors, since I have not had them... but I can put in my absolute support for Armor Games andtheir sponsorship over the past few years. Probably the nicest people I have dealt with over the internet in a long time.