Best? Citrus, hands down!
Worst? Thai Giant Jujube, hands down!
When flowering, my jujube smells exactly what I imagine a sock hamper in an NBA locker room would smell like after all those overpaid heroes had showered and gone home.
Be that as it may, the wasps (and I don't mean White, Anglo-Saxon Protestants) seem to love it, judging from the wasps of every size, color, and shape imaginable that swarm that tree all day when it's in bloom.
Honeybees stay away, but wasps love it. Too bad they don't pollinate worth a damn.