Obviously there is stuff that I wouldn't play in a club that I play at festivals, and vice-versa, but my sets are still dominated largely by my own music. I think that's what makes me stand out a bit. My music is also festival- and club-friendly, so it generally works out well.
AviciiI'm good at melody - I'll write the top-line melody and ideal words I want to go with it. But I'm not that good at writing lyrics. I bounce those back and forth with songwriters or someone who can sing.
Avicii