Why Male Puppies are better than Female Puppies
Many people believe that female dogs make better pets. Most inquiries for pet dogs are from people wanting a 'sweet girl'. They think females don't display alpha behaviors like 'marking' and/or 'riding' other dogs. They believe that females are more docile & attentive & do not participate in fighting for dominance.  
Well, that is NOT true.
  In the dog pack makeup, females usually rule the roost.
They determine the pecking order and who competes to maintain 
and/or alter that order.
females are, as a result, more independent, stubborn, and territorial
than their 
male counterparts.  
females are much more intent upon exercising their dominance by participating in alpha behaviors such as 'riding' other dogs.
Most fights will usually break out between 
2 females.

Males, on the other hand, are usually more affectionate, exuberant,
attentive, and more demanding of your attention.
They are very attached to their people.
They also tend to be more steadfast, reliable, and less moody.
They are more outgoing, more accepting of other pets, and take quicker to children.
boys are easily motivated by food and praise, and
so eager to please that training is easy. 
males can be easily distracted during training, as males like to play so often.
And no matter what age, he is more likely to act silly and more puppy-like, always wanting to play games.
Boys are fun loving until the day they die.

Females tend to be more reserved or dignified as they age.
Think of the human equivalent of the twinkling eyed Grandpa still playing catch with the grandchildren, at age 70 while Grandma quietly observes from the porch.
Neutered males rarely exhibit secondary sexual behavior such as 'riding' or 'marking' and lifting of the legs.  Once the testosterone levels recede after neutering, most of these behaviors (if they ever existed) will disappear.  Boys who are neutered early (by 9 months of age) usually don't ever raise their leg to urinate.
And while the female will usually come to you for attention, when she's had enough, she will move away.  While boys are always waiting for your attention and are near at hand.  Females are usually less distracted during training, as she is more eager to get it over with and get back to her comfy spot on the couch. 
The female is less likely to wage a dominance battle with YOU, but she can be cunning and resourceful in getting her own way.
She is much more prone to mood swings, one day she may be sweet and affectionate, the next day she may be reserved and withdrawn or even grumpy.  
  The female also has periods of being 'in heat' unless she is spayed.
Seasonal heats can be a month long nightmare, not just for the 
female, but YOU and every male dog in the neighborhood.
Not to mention unwanted puppies that you would have to take care of.
If you are not going to be a "RESPONSIBLE BREEDER", you would be better off to have her spayed, since during this time she can leave a bloody discharge on carpets, couches, or anywhere she goes.
She will be particularly moody and emotional during this time.
A walk outside during this period can become hazardous if 
male dogs are in the vicinity, and she will leave a 'scent' for wandering intact males to follow right to your yard, where they will hang out and 'wait' for days and days and days and days.
Before deciding on any puppy, you should give some consideration to
any other dogs or cats that may be in or around your home.