How does the playwright describe Higgins at the opening of Act 2?

From the text:

"He appears in the morning light as a robust, vital, appetizing sort of man of forty or thereabouts, dressed in a professional-looking black frock-coat with a white linen collar and black silk tie. He is of the energetic, scientific type, heartily, even violently interested in everything that can be studied as a scientific subject, and careless about himself and other people, including their feelings. He is, in fact, but for his years and size, rather like a very impetuous baby "taking notice" eagerly and loudly, and requiring almost as much watching to keep him out of unintended mischief. His manner varies from genial bullying when he is in a good humor to stormy petulance when anything goes wrong; but he is so entirely frank and void of malice that he remains likeable even in his least reasonable moments."