In my twisted, out of whack world, a player who hits any kind of rallyball is playing defensive minded tennis. Whether it's a slice, a soft flat shot, or a heavy loopy topspin, it's still defensive tennis.
Offensive tennis is going for a forcing or winner on the very first chance you get, subject to interpretation. When you're going for winners, you RIP the ball, or dropangle it. But you don't hit a defensive rallyball.
I can say this without a grain of salt because I cannot run one step in the last 5 years, and any rally longer than 4 shots means I will not only lose that point, but get sooo tired and winded I'll probably lose the next 3.