Someone who insists a lot can be described as "persistent" or "insistent." They may be viewed as "tenacious" if their insistence is particularly determined. Additionally, terms like "demanding" or "pushy" may apply depending on the context and tone of their insistence.
chatterbox
booser
a cab
A man.
A Krillin.
If you mean someone that dreams a lot. I would call them a daydreamer, or a dreamer in general.
Spanish kisser
Tattletaler
a bully
A person who schemes a lot is often referred to as conniving or manipulative.
Ambitious or dissatisfied with their lot.
One name for someone who likes to talk a lot is "chatterbox". An adjective for someone who likes to talk a lot would be "gossipy".