Which dog is the friendliest? I'm not very good with snooty creatures?

My brother’s got a Doberman and it doesn’t pay any attention to strangers and hardly any to anyone else apart from him. I’ve heard that they’re kinda a one person dog. I’d be happier with a gregarious dog, the kind that’d be comfortable getting a drinks party warmed up, or going up and introducing themselves to pretty strangers in the park.