First Las Vegas is great - spent 4 nights Caesars and will return. Need to do Heli to GC and shows. Takes days just to go to different hotels, 150+ shops in Caesars alone. Did small bit gamblings as not a gambler.
SF great - do Alcatraz at Night, Golden Gate on open Trolley Bus, get Tram tkt for 5/7 days and hop on/off (expensive to do it other way)
Los Angeles is a great city, so big, so much to do, so different in so many parts, _ daunting to get around (27 separate cities) so most ppl dont and say its crap. U need a good car and sat nav.
I did LA, Palm Springs, Phoenix, Flagstaff, LV and LA on 1 trip.
LA, Santa Barbara, Monterey (jazz festival), SF in 2nd trip.
Including all atttractions/sights on way, for example, Hollywood, Venice Beach, Malibu, Warner Brother Studios, Sedona, Grand Canyon, Palm S, Phoenix Scottsdale, Meteor Crater, Route 66 and the list goes on.