I love its new features like iMessage, multitouch swiping for multitasking, improved camera quality, Twitter integration, sharing files between devices via iCloud, split keyboard on iPad, the ease to reply any messages from the lock screen, and its new notification center. And it still has other features that I haven't explored yet.
I must agree with Apple, that this is yet the best iOS ever made. They really listen to what their consumers want and give them much more! Heads up, Apple! :-)