Oops! You left out the words! However, I can still help :)
First, you have to know the definition of connotation. You might be more familiar with Denotation which is the dictionary definition of a word.
Connotation however, is the way a word makes you feel.
For example, talkative and conversational pretty much mean the same thing. More than likely though, you see talkative as a bad quality and conversational as more of good quality.
The word with a negative connotation would be talkative.
The word with a positive connotation would be conversational.