Here is a dog breed quiz to help direct you towards maybe a breed that may work for you. They site also has a lot of pictures and info on a bunch of different dog breeds as well as a lot of information on raising dogs and such.
My advice would be to not really focus so much on the breed as much as finding a dog that you can handle and live with. All breeds are going to have some dogs that are snippy, or yappy, or have behavioral problems and all breeds are going to have calm, laid back dogs. Yes, there are breeds that are more known for certain personality traits, but each individual dog is different. I hope I just made sense... lol
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