First, I don't chrono so all this is objective. That said, speed is plain old fun to see if nothing else. I first want smoothness of draw, tuneability & stability in hand, but given that, the bow that appears to "zing" an arrow is just plain fun to shoot. I shoot rifles too, and always wanted a .220 Swift for one reason only: speed. A golf ball ripped off the tee and appearing to rocket away? Wish I could do it. Heck, I love fast cars, too.
But it's a balance. I've left faster bows on the bench and hunted with slower bows that were smoother, steadier, or just plain felt better to me. I like it but don't chase it.