Typically negative; words like 'slim' and 'thin' have a more positive connotation. Skinny means overly thin, in my point of view. Hope this helps:)
Positive connotation: Exciting Negative connotation: Risky
negative
It is a negative connotation.
Skinny
Mysterious has a neutral connotation.
What is a positive connotation
It is a negative
uneasy is negative connotation
It is a negative connotation?
negative
negative