Timid (Negative) - The word timid has a negative connotation because it makes you sound helpless and week and shy. It also sounds like you are incapable of things.
Humble (Neutral) - The word humble has is neutral because it is more modest on how you are acting and how you feel about someone. It shows that you don't think lowly of them but you also don't think highly.
Respectful-(neutral) The word Respectful has a positive connotation because it implies that you care about what the person has to say and that you listen to what they say and care about their ideas or anything they are talking about. Or that you just think highly of a person and you are showing them that's how you think.
Thank you so much
arrogant (negative) - arrogant is negative because its making you sound overly satisfied in yourself and you aren't caring about other peoples feelings and that you rub it into people about how cool you think you are.
Proud (Neutral) - Proud is neutral because it shows you are very satisfied and feel good about yourself but its not being cocky about it and you are not too positive.
appreciative (positive) - appreciative is a positive connotation because it shows that you are proud of things but your also grateful and not all snobby about something you have accomplished.