Does it have a positive or negative connotation when I say something serves as a reminder of ...? For example , A photo album would serve as a perfect reminder of our friendship and the wonderful time we spent together. This photo serves as a great reminder of the trip to Europe . This scar serves as a constant reminder that I should be more careful when I cycle. Does the sentences above all sound natural to native speakers? If they don’t sound natural , could you revise them for me ? I wonder if this expression “ serve as a reminder “ could be used both positively and negatively ? Thanks a lot ! I appreciate your help !