If you have a lot of time to spend with your dog, one dog would be perfectly fine and happy. If you cannot spend much time with you dog, consider getting another dog. This will give both dogs someone to play with and get exercise. Consider, however, the expenses involved in properly caring for one dog, then double it. Deciding on either a male or female is also a matter of preference.
Males are usually larger than females.
Females that are not spayed will come in season twice a year. Each dog has its own personality. It's sometimes best to trust and let your instinct decide. If you are thinking about whether to get a puppy or an adult dog, here are a couple of points to consider. While puppies are just inherently cute, they usually require more time and money.