It depends on your personal preferences, family environment, and economic situation which type of pet is suitable. Large dogs have advantages of large dogs, and small dogs have advantages of small dogs. If your home's living area is relatively small, consider a small dog.
Bulldogs are large in size, drool a lot, but are adorably silly, have average intelligence, and eat a lot. If you are small in stature, you may not be able to control it when taking it out;
Golden Retrievers eat a lot and drool a lot, but are very obedient and smart, listen to commands, like to pick things up, and shed hair in summer;
Pomeranians are very playful but also bark a lot;
Huskies have a rather wild personality, are prone to running away, playful, and belong to the 'goofy' category of dogs;
Samoyeds have a sweet appearance, have the trouble of shedding hair, some also bark a lot, and are not easy to control when walking outside because sled dogs are strong (Huskies are like this too);
Teddies look very cute, bark a little, require regular grooming (which can be costly), otherwise they won't look good.
Yorkshire Terriers have beautiful gold and silver long hair but are troublesome to maintain;
German Shepherds have luxurious long hair, are gentle and very considerate. I have this kind; it is my personal favorite. The only trouble is the shedding during summer. Small Shelties are similar to German Shepherds;
Also Border Collies, the smartest dogs, full of energy, love to play and be lively; people without enough energy can't manage them;
Old English Sheepdogs are goofy. The dog in the Lebon paint commercial is this kind, with fur long enough to cover its eyes, haha.
These are the common long-haired dogs I can think of for now. It depends on which you like.
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If you like small dogs with longer hair, it should be Shih Tzu, Pomeranian, large Samoyeds, and Great Pyrenees.