The best ringtone I ever used was Voodoo Child (slight return) by Jimi Hendrix because the opening is just random chunky electric guitar out of time sorta and atmospheric – never felt embarrassed if the first 10 seconds interrupts my surroundings, it isn’t intrusive like many ringtones but even if it goes long enough to the entry of the band it never results in strangers sending me irritable looks, just admiration.