There are 2 pieces for me that fall under this sort of category which should be played together.
The other option is to play something nobody else plays, and thus you play it the best even if you don't play it well at all.
Care to share what those two pieces are?
Well, that would be Chopin's Nocturne no.20 c sharp minor, op.posth.Aah, yes. Twinkle twinkle little star (and by this I mean Mozart's variations on the theme )
do signature pieces serve any particular purpose if ur not spectacularly famous?? lol i mean what good is a piece that everyone knows you for if nobody knows you to begin with?
In general, I would say that a signature piece should be something you play better than everyone else...
Beethoven's "Rage over a Lost Penny" and Brahms F# minor sonata (no. 2) No one plays this one...every one plays 1 or 3...grrr!!!!