What are the best, worst, and weirdest smelling chemicals you have encountered?

Best: Isopentyl acetate smells like sweet banana candy. according to pop science, it smells like what gros michel bananas tasted like, before they went extinct and the gross slimey cavendish replaced them.

Worst: Butyric acid smells like someone ate cheesy taco bell, subway, and pepperoni pizza, fermented it all together into a sick chunky biley soup in their gut for 8 hours, got food poisoning, then puked it back up as a yellow soup interspersed with red meat chunks.

Weirdest: 1-octanol has a pungent sweet floral smell. You can't decide if it smells good or bad.