I'd say that LA has many of the same issues. Most of LA is very dirty (though a few of the most touristy areas are very clean). If nothing else the air quality

I'd say that LA has many of the same issues. Most of LA is very dirty (though a few of the most touristy areas are very clean). If nothing else the air quality alone is reason enough to consider it dirty. Public transportation in LA is worse than San Francisco, especially once you need to get out of the core of the city. San Francisco has BART and Caltrain which make traveling between the city and most of the nearby regions pretty convenient (though the price has been climbing). Within the city, the bus has served me pretty well. Especially with nextmuni.com to tell you when the next bus will actually arrive. I've never had an incident on a bus in SF (admittedly I haven't been here long), but when I lived in LA I rarely took the bus without having to deal with someone who was truly crazy. And LA traffic is so much worse than San Francisco, traveling by bus makes that much less sense.