Just an all-around great, comfortable car. Doors close like a 1969 Cadillac (that's a good thing). Performance is terrific, ride is soft but firm (as I like it) I have driven for 10 hours straight (minus bathroom breaks) without having a sore back at the end of the day. FWIW, tested the Cadillac STS, Acura RL and BMW 535i. I have no doubt that I made the right choice with the Lexus.
Engine, comfortable seats, HID headlights and small turning radius.
Move the fuel door release to the dash, shorten the C pillar for better side/rear view when changing lanes.