I was too young and too disinterested when the Beatles were together (I grew up on country music and was far more interested in Buck Owens than the Beatles at the time). Since I discovered them in my teenage years, however, my favorite Beatle was, and remains, McCartney.
To me, McCartney's music encompasses something for everyone. I will be the first to admit had has recorded some bad songs (e.g., "Let 'Em In," the entire "Wings Wild Life" album); however, his good has outweighed his bad, and that has been for fifty years. He did my favorite Beatles songs: "For No One," "Yesterday," "Blackbird," "Golden Slumbers," and "I Will." "Band on the Run" was one of the best albums of the 1970s. Add to all that the fact that he truly was a model husband for 29 years. The only time he and Linda were ever separated was the week he spent in jail in Japan for the "pot smuggling" charge.