Why are you fools raving about the Emperor as if he was some god? He is merely our glorious father, a man without peer and wisdom beyond mortal understanding. He has set aside religion in favor of progress and scientific advancement! Do not trust the words of Lorgar and his Lectitio Divinitatus--he is acting against His word in practicing such pagan acts!
Nonetheless:
R'hllor seems like a pretty sweet god who gets shit done in Westeros, in comparison to the Seven, who seem more like our real world gods, simply being figures people worship without putting out.
Gork and Mork. Who doesn't like a cunningly brutal and brutally cunning god? Who can know which one is which? I dunno, let's go krump zum humies! WAAAGH!