If you decide to keep a dog you have passed only a half of the way. There are so many breeds that it can take you ages to decide what kind of dog you want to have. When making your choice you should take into account certain criteria in order to select a pet which will suit you best.
One of the most obvious conditions which plays an important role in this issue is space. Do you have a flat or a house with much space to walk with your dog? If your apartment is not large enough, consider taking pet of a small size, like Yorkshire terrier, for instance. Note that it is essential for any dog to have an opportunity to move freely.