AC is a must here in the Central Valley, CA,. Twice a year, spring and mid summer I'm cleaning the dust/dirt off the vents on the condenser unit. Just like cleaning the intercooler on our LGT.
The homeless wasn't too bad, they mostly hungout around the highly populated areas such as Pikes Market, very typical and reminds me a lot like San Fran. Overall the city was clean and easy to get around to see all the sights.