I like both and prefer manual more as i feel the vibrations just dont suit me. All of a sudden when the vibrating shank touches my front tooth’s tip i feel sensitive kind of.
An electric toothbrush is usually recommended for children, older adults and specially abled people.
Normal people can also use it depending on their choice.
I didn’t use electric toothbrush yet. I am fine with bristles Electric toothbrushes were actually invented for people with manual dexterity, specially for elderly people and those with disabilities. But people use it often now.