For acro, you'll need to have quite a free schedule as not attending practice regularly means that you'll be letting your partner down, you'll need to be extremely strong and flexible (in acro you are either lifting people or balancing on people) and you'll also need to be able to get along well with other people. You don't need to be amazing at tumbling (I can't even do a back handspring) but if you are then that's a bonus.