I had a bottle of shower gel, quite pricey, called Wash With Joe (no thanks). It was coffee mint. My problem with it was that whilst I love the smell of coffee, it’s not a smell I associate with clean or personal hygiene (like say mint, lemon etc). Coffee is a lovely smell but, much like petrol or fresh tarmac, I don’t want to stink of it.
A candle with a nice coffee smell would be lovely as doesn’t fall foul of making me smell of it.