Couldn't help myself quoting it. Sounds great, by the way.armature programmers
Music will not do, because when you are playing a tease, the sound is downloaded the moment you stumble on a page with it. Even longer metronome files sometimes take time to load because of the filesize. For music - the page will probably be halfway through by the time the music is downloaded. Also, keep in mind that bandwidth is payed for by the team, so uploading millions of unnecessary Full-HD pictures, or, as you suggest, music files - just a waste of space.- Metronomes
Nothing annoys me more than tick tick tick tick tick. Maybe find music with the tempo you are looking for? And please do not make an entire tease of nothing but metronomes.
Metronome is loved by lots of people. There are a number of threads that ask for all teases to add metronome, completely opposite to your plea. It's a matter of preference.
As for other points - some I can agree with, others I don't care about. All is good in the right measure.