Of the CA Hyatts that I've been at from North to South:

GH SF - good location, dated rooms badly in need of renovation supposed to start son
HR SF - haven't been since renovation but good location and supposedly amazing RC
HR SFO - good airport property but nothing else really stands out
Highlands Inn - very unique property, treated very well the 2x that I've been there - as close to a try to get there at least once property in CA
Andaz LA (West Hollywood) - great restaurant, decent renovation, can be noisy party scene, my preferred LA property now
HR Century Plaza - decent large convention type property, great gym since its the upscale Equinox membership gym but complimentary access for Diamonds
HR Huntington Beach - decent but overpriced IMO
HR Newport Beach - quirky property with some very dated features
HR Irvine - typical suburban business property
GH San Diego - on my avoid at all costs list due to a big list of problems last stay and the ownership's views
HR Indian Wells - decent resort property that can have a lot of kids around, good location for golfing & tennis but quite a drive from Palm Springs proper