I have not much problem whatsoever in returning really big first serves, in fact, I prefer them. I love to play against our number one singles player because he has the biggest serve on our team (him and I both) and I can easily return his serves, often times for a return ace or at least give him a tough shot. However, once I go to returning more average serves of slower pace, I usually hit them into the net or long. My timing is just horrible on these slow(er) serves. Most people cannot return fast serves, but can slower ones. I am reversed and want to be able to hit the slower serves since that is what I will see more often from anyone. I must have good mechanics, etc to be able to hit such great returns against fast serves (and I don't just block it back, I hit an all-out grounstroke and pound it back, usually short to his feet as he often serves and volleys). What is different to prevent me from attacking less punishing serves?