Back in the 80s and 90s, the nicer parts are around Lincoln high school and Lincoln Center, Billionaire Alex Spanos' compound is there, the north east corner on the other side of the 99 freeway up to the Morada neighborhood and the Brookside area that was developed in the 90s and the Country Club area by the golf course i.e., Cliff Drive, River Drive, etc. There are a few others too but the ones listed are the ones I remembered from my time there in the 80s and 90s..
Generally speaking, the south side and east side are the bad sections i.e., Conway projects, Sierra Vista Projects, Farmington (one time the apartment complex houses all Hmong), Boggs Tract, etc.