I like the Riviera the best as well. The place has so much character. I suppose the 11-12-13 stretch is less memorable. But in person, the 11th is wonderful to play. It has one of golf's great hazards, a broad, shallow channel with playable lies that crosses the fairway in the exact right place. The 12th has a memorable tree next to the green. In general, the Riviera has the most distinctive trees of any course I've played. The Riv probably has more holes that I would award a Doak !! and !!! rating for individual holes. #10 is great, but #9 is to die for.
I'm such a homer. My three favorite tour stops are probably the Riviera, Pebble Beach and Kapalua.