Good advice, Alice. Fortunately for me, I am never the only singer in a performance, I just sing a couple of songs or arias and leave, (many times as the last number *BG*) and then I always leave them wanting more. It is one of the advantages of not being a star (yet).
(And being the last, wearing black clothes and leaving soon is another advantage to escape from any violent reaction)
No joke, that´s a reason I prefer CDs that include several performers. Even the most perfect and enjoyable voice becomes boring after the 15th song.
Un abrazo - Andrés