I was told, fresh coriander has a whiff of bedbugs. Not having much experience of the latter

, I can only speculate. But I like the scent, and that goes for all the fresh herbs that have been mentioned.
While out on a ride in early spring, I love to try and pick up the scent of sweet violets if I see any, but it's usually faint and elusive. So if you see some weirdo, bike nearby, knelt down by the verge, face apparently buried in a grassy bank, in March, it could be me...