I recently bought a trench coat that was on sale, but have to be honest, I am not crazy about the belt. So, I switched out the belt for a funkier one.
My style personality is more 'Classic Quirky' - so I like nicely tailored and classic clothes that fit my body nicely, but I like to add fun and creative elements to show off my personality.
There's isn't a rule that says you have to wear your trench coat, winter coat, belted sweater or blouse with the belt that it comes with. Switch it up with a funky embellished belt, a skinny leather one in a fun colour, or a wide animal print belt.
There are no rules here. It can match your garment or totally contrast with it - use it as a opportunity to express your unique style and have fun!