Gosh, I have so many favorites! What DON'T I like? Let's see, I like "Always on my mind", I heard he wrote that for Priscilla, it's so sad. He truly loved her. Um, I like "Can't help falling in love", "In the Ghetto", "I did it my way", "Tell me why", and of course I loved all his gospel songs, especially "Amazing grace" and "How great Thou art".
I have his whole collection of albums.