"Hairy" is already a neutral term. It simply describes the presence of hair.
However, if you're looking for a more positive way to describe someone or something with a lot of hair, you could consider:
* Luxuriant: This emphasizes the abundance and fullness of the hair.
* Full: This is a simple and direct way to describe hair that is plentiful.
* Thick: This implies that the hair is dense and strong.
* Fluffy: This is a more playful and endearing way to describe soft, abundant hair.
The best word to use will depend on the context and the specific type of hair you're describing.