San Luis Obispo is affected by various issues: noise, wind, cal poly, downtown, airport, freeway, mountain sun shadow, train, traffic etc. None of these are bad in and of themselves. Everyone has things they don’t mind… and or are attracted or repelled by… and each of us are different. My wife and I live near the train… doesn’t bother us. We also have a certain amount of traffic noise…. but we weigh this against our proximity to services, the downtown lifestyle, and the great weather in our part of town (less wind). It is a balance… and everyone is different. This Noise map may help you decide what areas are good for you. It is from 1990 I think. I got it from the SLO General Plan.