I get tempted every year to switch to Android and when material design made it's appearance with Lollipop I very nearly made the switch to a Nexus 6 instead of an iPhone 6 Plus (I love large phones or phablets as they used to be called). However the Nexus 6 was ultimately a letdown (the camera left a lot to be desired for one thing) and there are several other things that ultimately made me decide to stick with an iPhone.
1. Support. I love the fact that if anything goes wrong I can take my phone to the nearest apple shop (or 3rd party repair shop in the case of Hobart) and get it swapped over for a new one, usually on the same day. This actually happened to me with my Plus in the first month of ownership as the OIS failed in the camera, but I had a brand new phone within a few hours of reporting the problem. There's very little chance of getting that type of support with an Android manufacturer (you may get a new phone sent to you, but good luck getting it the same day).
2. Ecosystem. Apple's ecosystem of apps and accessories is unrivaled and I'm already invested quite heavily in it. Google Play has gotten way better, but it's still very fragmented and lacks the curation and quality of The App Store. I love universal apps that look just as good on my Ipad as they do on my iPhone 6 Plus.
3. I already have a lot of Apple products like an iPAd an AppleTV which an iPhone naturally works much better with. However I also have a Chromecast (which I use with my Nexus 7 and some iOS apps) and the experience is pretty good. It works quite differently to Airplay though as specific apps need to support it (where as you can Airplay/screen mirror just about anything on iOS).
4. Camera. If you were to go by specs on paper then it would be easy to assume that Android manufacturers have surpassed Apple, and in terms of raw pixel count that is true. However as I'm sure most people here know there is far more to a good camera than just megapixels and Apple struck an excellent balance between resolution, pixel size, lens system, backlit sensor and OIS to give the iPhone 6 Plus excellent picture quality in a range of conditions.
In perfect light the iPhone 6 is now admittedly bested by models like the Samsung Galaxy S6 and the new Note, however in low light the iPhone 6 is still superior IMHO (less noise, better colour balance, and it's much easier to get a sharp non-blurry picture even when your hand is shaking). I find the iPhone 6 to be the easiest phone camera to pick up and take a quick photo with without waiting for focus, putting up with shutter lag, or having to mess with settings. This is somewhat subjective, but most review sites I've read still rate the iPhone 6 Plus as one of the best smartphone cameras out there. I very much look forward to seeing what Apple has in store with the upcoming 6S.
5. Jailbreaking. This one is a real niche area so it wont apply to most people, and there is a lot of misunderstanding about the risk and benefits associated with jailbreaking (plus it can admittedly be annoying playing the cat and mouse game with apple patching jailbreak exploits with every software update). However if you put the time and effort in it's astonishing the range of awesome things an iPhone can do when jailbroken that Apple would never allow. To be honest I may well have switched to Android if it weren't for jailbreaking as I love to tinker and customise my device exactly the way I want it, which is what jailbreaking allows. As an example I'm a PC user so I would usually miss out of the benefits of integrating iMessages in with my computer, but thanks to a jailbreak tweak called "Remote Messages" I can see and reply to all my iMessages and texts via a browser window, which is something I use all day.
Here are just a few of the cool things you can do with a jailbroken device (this video was made for 8.3, but I'm currently running 8.4 jailbroken with a similar range of tweaks).
There are other benefits to sticking to an iPhone over Android like Apple's great build quality, beautiful screen (even though it's "only" 1080p I love Apple's IPS displays) but the above are the main ones that leap to mind.
I still love Android though (I use my old Nexus 7 all the time) and I know I will still be very tempted by the revised Nexus 5 when it's unveiled (providing the camera is up to scratch which it rarely is on Nexus devices). However I'm very keen to experience Force-Touch with the new iPhone so I doubt I'll be making the switch!
🙂