Dr. Proctor is a womanizer; he made advances on Misty, Jessie, and Nurse Joy. However, these attempts failed on Misty and Nurse Joy, but not on Jessie, who fell for him immediately.
Proctor also appeared to be very lazy, but mostly, he had very little confidence that he could treat Pokémon, as he had no experience in the matter. He didn't want to open up his hospital to treat any of the injured Pokémon until Ash, his friends, and Nurse Joy convinced him to. However, once he was engaged, he became a skilled and competent physician, treating his patients with confidence and compassion. He also proved to be a formidable fighter, using his medical equipment as weapons to help foil Team Rocket's attempt to steal all of the injured Pokémon again.
Dr. Proctor appears to be based on Dr. Doug Ross, a character on the American drama ER. Rikaya Koyama, Dr. Proctor's Japanese voice actor, was the voice of Dr. Ross in ER's Japanese dub. Like Dr. Proctor, Dr. Ross is a womanizer. And, as Dr. Proctor was drawn to look like Dr. Ross, he looks like an animated version of Dr. Ross's actor, George Clooney.