Pretty much all of the metronome sounds are really irritating. Instead of using any of them, I usually create a wav file in FL Studio and import it into Audition. (A sound I like a lot for a click track is a shaker.) It would be a lot easier for me to use the metronome in Audition rather than going through all that procedure in FL. How about some more attractive sounds in metronome?
Okay, I've discovered something strange but interesting and useful. If I select 'Constant' in the metronome settings, it improves the nature of the sounds.
You could still rehabilitate the sounds though, for the people who don't want a constant click sound, or allow people to add their own sounds to the metronome folder.