I have actually gone thru phases where each has been my favorite for a period of time (Ringo less so than the other three but I do thoroughly enjoy most of his LPs/CDs and have gone to see him in concert thrice).
John was my first favorite and remained at that level for the longest period of time, then it was Paul, then George, and finally Ringo for a brief period of time. For many years now, I've been at a point where I actually like them all equally well.