Dialect is certainly an interesting subject. In California, most of us don't have recognizable dialects like the rest of the country. Sometimes there is the layed back stereotype of a California dialect, with is long and mellow annunciations, for example you hear "hey bro, take it easy". This is usually attributed to hippies or surfers, but is certainly not common amongst most Californians. We don't have the southern drawl that you hear in the south, or the thick accents of New York and New England. It always makes me laugh when I visit my family from Chicago and when they pronounce words with a heavy "o", like "coffee" is said "kauwfee". The only recognizable thing I can think of is the vernacular used here in northern California when people say "hella" to replace words like "a lot". But I think the lack of an instantly recognizeable accent in California has to do with the large size of the state and the diversity of cultures here, which in it's own way, makes California very unique.
Dialect can easily be looked over, but it is a very important part in understanding cultures. It can tell us where we are from, where we went to school, who you hang out with and what your job is. In some regions like the UK, what social class you are in is based off of your accent. so understanding dialect is fundamental to understanding a culture.