Yes and no, most people combine the aspnet.mdf and the personal.mdf into one database. The aspnet.mdf holds your user information like logins and user settings, the personal.mdf holds your album and picture information.
FYI: the stock personal web starter kit (pwsk) stores the images in the database which is not very web hosting friendly if you plan on using it for your personal site on a paid hosting account. You might want to search for articles about how to convert the default photo storage to storing them to disk (file system). There are many articles out there and guides on how to do this.