I really enjoy iOS 7 since it was a huge step up from 6, it also runs extremely well on my iPhone 5S so that's great too. Not really too excited for iOS 8 since I'm already satisfied with iOS 7, so anything new the add is just more icing on an already heavily iced cake.
I only upgraded to 7 to download apps. Had i not i would still be on ios 6. I like thebdesign much better. And since i dont use my ipad for apps, its staying ios6.
I liked 6 for stability, but 7 is better at this point. I just seem to notice it crashes more often than ever before and others seem to say the same. Be it a soft crash to show the Apple logo then go back to your home screen, or random app crashes even within the phone's default ones at times lol