I spend countless hours listening to great performances of great music by great artists. The performances that touch my heart are the ones that meld great singing of important texts with great emotion and expression no matter the style or genre of music.
And that is what we seek to do in our choirs. A great choir performance comes from tapping into the same things great artists tap into. Take the time to build a strong vocal technique, sing the best music within whatever style or genre you are singing (classical, folk, jazz, musical theatre, pop) and marry it to a selfless, honest and expressive presentation. Great singing is great theater. The audience must be engaged by your presentation or it is meaningless. Make the audience care about what you are singing by opening your spirit to sing with honesty and devotion. That is were inspiration comes from.