Seems like it's been a while since there's been a nice classical discussion thread. Let's see if we can't change that. To get the ball rolling and generate our first topic, as well as get a feel for everyone's tastes, let's start it with a simple little survey.
Leave out any of the categories which don't apply to you, naturally. And feel free to add any of your own.
>FAVORITE SYMPHONY
>FAVORITE KEYBOARD CONCERTO
>FAVORITE NON-KEYBOARD CONCERTO
>FAVORITE FULLY ORCHESTRATED PIECE (which is not a symphony)
>FAVORITE STRING QUARTET
>FAVORITE CHAMBER ENSEMBLE PIECE WITHOUT KEYBOARD (other than a string quartet)
>FAVORITE CHAMBER ENSEMBLE PIECE WITH KEYBOARD
>FAVORITE SOLO INSTRUMENT SONATA WITH KEYBOARD ACCOMPANIMENT
>FAVORITE SOLO INSTRUMENT SONATA WITHOUT KEYBOARD ACCOMPANIMENT
>FAVORITE KEYBOARD SONATA
>FAVORITE SOLO KEYBOARD PIECE (other than a keyboard sonata)
>FAVORITE OPERA
>FAVORITE OPERATIC ARIA
>FAVORITE OPERATIC DUET, TRIO, ETC.
>FAVORITE ORATORIO
>FAVORITE ORATORIO ARIA
>FAVORITE ART SONG CYCLE
>FAVORITE ART SONG
>FAVORITE MASS SETTING
>FAVORITE CHORAL PIECE WITH INSTRUMENTAL ACCOMPANIMENT (other than a mass setting)
>FAVORITE CHORAL PIECE WITHOUT ACCOMPANIMENT (other than a mass setting)
>FAVORITE PIECE WHICH FIT(S) INTO NO EXISTING ESTABLISHED FORM