Photo Credit: russ
San Diego is a city of about 3 million people located in southern California, about 20 miles north of the US-Mexico border. The downtown area is located on the waterfront of San Diego Bay, tucked in behind Pt. Loma and the well to do island of Coronado. The downtown has recently undergone many changes, and is quickly becoming one of the best places in San Diego to live. Centered around the "Gaslamp District" and Horton Plaza, there are many bars, clubs, and other attractions. Now there is also a ballpark downtown, Petco Park, the new home of the San Diego Padres.
Known as "America's Finest City" San Diego has plenty to offer. In addition to the proper downtown area, there are all sorts of communities of different flavors, including the ritzy area of La Jolla, the beaches incuding Pacific Beach, Mission Beach, and Ocean Beach. Even among the beach areas, each has its own unique character. In all of San Diego there are many miles of beaches, and there are an abundance of activities, both indoor and out. If hanging out at the beach isn't enough, you can snorkel or scuba dive in La Jolla, check out museums in Balboa Park, go hiking at Mission Trails Regional Park, make the short trip to Tijuana, shop at any of the many malls. You are also a short drive from doing some camping in the mountains, hiking in the desert, or visiting Los Angeles.
Although San Diego is a large city, it does not have a lot of high rises, rather the city sprawls outward. There is the downtown "proper" area with many high rises and a more downtown feel, but then there are many large sprawling communities around it. Unlike most cities, many of the business and commericial areas are not downtown, although with the revival of the downtown area, things are beginning to move downtown again.
If you are thinking of moving to San Diego, keep in mind that although there is public transportation, it's nothing on the scale of Boston or New York City. There is a trolley which runs around the downtown area, and also to Old Town, Fashion Valley, and recently expanded to include SDSU, but it doesn't serve outside of those areas. It can be helpful for getting to downtown if there are events or you don't want to deal with parking, but beyond that you still probably need a car. Or if you don't have a car, buses are the best option if you go out of the areas served by the trolley. If you need to get between downtown and north county or Los Angeles, you can take the Coaster (to Oceanside only) or the Amrak, which runs through LA.