Answer:
Conversational: fond of talking
Explanation:
Synonyms are those words that share similar meanings to another. They can have either a positive or negative connotation.
The word conversational gives a positive connotation to a person that tends to chatter a lot. The remaining words (blabby, gushing, and wordy) give a negative connotation to this kind of person because they refer that this person is annoying due to his/her habit of "talking too much".