Reinforcing what others have said-
Diverse (many languages spoken)
Mostly smaller older charming (20'/30's) homes on small lots
Urban (dense, lively, packed with people and businesses)
Mostly middle to lower income
Crime (check the maps as suggested)
Easy transportation (near BART station, buses, 2 major freeways)
Close to Alameda
Short drive to Downtown Oakland & Jack London Square
Have you been to the Mission district in San Francisco? Different architecture, but similar feel.
Now a question - why would you ever purchase a property without visiting to see it? Not a good idea! A picture is worth a thousand words, and standing in a neighborhood in front of the property is worth millions (or at least the price of the asset you purchased). No amount of photos and online stats can compare tell you what being there in person will.