Well, I'm about to buy an arranger, and while trying to find out what people do with their keyboards, I was wondering about the following:

Do you usually try to "fake" a song as close to the original as possible?

Or do you make your own accompaniment over the chords, trying to add some stuff or simplifying?

Or do you make a new arrangement to a tune, with new chord changes, changing the style, etc?

Or do you play your own compositions or improvisations? Do people like that in live situations?

Markus