I've always used an eastern grip for my serve, I can get great powerful flat serves with it, top spin serves are doable but not amazing, and a hard spin serve is nearly impossible, so i'm thinking of switching to continental like most people use. Do you guys use continental for flat serves too? I just can't understand how you could do that, whenever I swing with continental grip I fell like i'm coming down on the ball at an angle. I can understand why that would make spin serves easier, but how on earth would you get a good flat serve like that? I must be so awkward.