For me, I have "my" breed and I will pick a dog of that breed based on its personality. So it's a bit of both. My first dog when I was 6 years old was a boxer, and she had all the traits I could ever want in a dog, so because of her I will always own a boxer (and I've met other boxers since then that only strengthen my love for them). But if I were looking for a dog, walked into a shelter and they had one boxer, I wouldn't adopt it JUST because it's a boxer. The right personality would have to be there, too.
And I guess even if I were an adult looking to get a dog for the first time, I would research breeds first and see which ones typically have the traits I'm looking for. So for me... yeah, ultimately the breed is the first thing I look for.
And I guess even if I were an adult looking to get a dog for the first time, I would research breeds first and see which ones typically have the traits I'm looking for. So for me... yeah, ultimately the breed is the first thing I look for.