I don't do iOS. That's probably the only thing I ever been biased about. iOS never impressed me at all. I've used Android for over 4 years since 2008. I still like the OS. I don't love it like I used. But I can see that Kit Kat has improved the experience and the M8 is very limited on features. Blinkfeed is okay. Kinda cluttered. I don't have an quarrels with the camera. It's not 1520 but I'm not a camera junkie, or I would had pulled the trigger on the 1020. The Live Tiles is what I'm missing the most right now and the Notification on WP is by far way better than on Android.
Having Google Voice is a big plus right now, even though AT&T Visual Voicemail is quite good. But I missed using my Google Voice for certain communication for people who I didn't want to give my real number to.
Time Warner TWC TV
Run Keeper
Better Red Box
WAY better Slacker
Better PayPal
Better MyFitnessPal
Local News. I used KVUE for WP and that app was so trashed, it don't even pull news feeds anymore. It's a dead app that MS won't remove no matter how many times I've complained it's a broken app
Better Groupon . The WP app is a joke.
Isis Wallet
Assurant ( my health insurance )
Amazon MP3
Capital One
I haven't even finished grabbing the rest of apps I use frequently. And of course we can say there's this app and that app that will replace this app and that. We can list all the 3rd party apps. But that's the biggest issue for me. We have to make sacrifices in order to be content. Look at the fiasco with WhatsApp. Things like this are bad for the better built ecosystem and will not get people to come on board.
It will be there, and I will still be around for it, but for now, I might just enjoy the little perks that Android has. I will say though it will make it harder for convincing people to switch OS when MS keeps add all their apps to Android and iOS. I can vouch for that from my own personal experience right now. At least now I can have both OS and view side by side. The app drawer is boring. I may have to look into other launchers, but I didn't realize how lackluster the screen were after being with Live Tiles for so long.