Try a fragrance on your skin and give it time to develop. The first impression can be different from the softer notes that appear later, so avoid deciding from a quick spray alone.
One or two sprays are often enough for a subtle everyday feel. Apply to skin or clothing according to the product directions, and avoid rubbing the area after application.
Choose what makes you feel comfortable rather than following a rule about seasons or occasions. Fragrance is personal, and your own preference is a good place to start.