Gibson at 6 weeks old
As you can see, a couple of weeks can make a huge difference! Now, coat types really start to stand out and personalities really start to show through. Puppies at this age are still really young and the world is still a very new place for them. Just because a puppy at this age may seem a little reserved, does not mean that is how they be when they are older.
Much like human kids, your puppy's personality will be in how you choose to raise them. If you lead a very active lifestyle (especially if your pup is around kids), your puppy will grow to enjoy this and be active themselves. If you lead a more calm lifestyle, then your puppy will adapt to this as well, learning to enjoy the comforts of being a lapdog. Though it is important to choose a puppy that speaks to you and that you feel drawn to, make sure you realize that puppies are not born with set personalities of how they will be as adults. A lot is up to you as future parents to help cultivate their lifestyles.