garrulous - talkative
A ‘garrulous’ person is somebody who is highly sociable and talkative. They tend to be quite open and friendly with people, which can be a positive in some situations, but if they are talking to a person who is shy or aloof, their garrulousness may be regarded as tedious or irritating.
My boss is quite a garrulous character, so I find it easy to get along with her.
Joe’s garrulousness can sometimes lead him to say things that he shouldn’t, and to be overly familiar with people.
She’s a garrulously intelligent and engaging politician, which is why she finds it so easy to connect with voters.