Hi Melinda
Bev not a great lover of flyball to be honest - she seen a lot of injuries through it.
My dog was totally obsessed with balls - now he couldnt really care that much about them - prefers hide the duck (rubber duck) or scent stuff or just running with mommy

oh and swimming in skanky water that is a big favourite but at flyball he would get the ball and generally spit it at me - they pick the stuff up quick. All the other dogs were manic - he was under bench sleeping in between runs.
We dont do it now - great for social stuff and I really enjoyed it as did he but it is very Yorkshire based as far as competitions go and the travelling was too much for us. I started for fun but soon the competitive edge takes over.
Agility is much more controlled and a real good one for obedience and bonding and working together.
Depends what you are looking for to be honest.
He will look at you trying to catch him as a game. I would just ignore him he will soon come back with the ball - not much fun just running around with it with no one to throw it.