I find one of vivaldi's 4 seasons is always to a friends taste. i also listen to Bach, Chopin, Debussy and other classical music
i can confidently say that my Favourite peace of classical music is Clair De lune
but another piece of music i find spine tingling is Un phare dans le brouillard (a lighthouse in the fog) which if played right is delightful music.
i hope this was of some help