1) That's why Nexus phones are the bomb. They are Android, but done the way that you seem to prefer Apple does things... You get all the benefits of Android, but done by Google where they design the phone to go with the software, like Apple... The Nexus phones get monthly updates and the new versions of the OS about 6 months before anyone else... Best of both worlds, really.
2) App preferences... What if I don't remember what file it is? Typically I have a work email with an attachment, or a file I downloaded at some point... Normally, I just click on the attachment, not click on it, save it somewhere, then go find another app and import it or move it, etc... I just want to see a new attachment in my email, click it and have it automagically open with my preferred app. Is that too much to ask? I know that there are workarounds... but it's 2016 man, I shouldn't have to do workarounds, it should "just work", and on iOS it usually doesn't. You don't see it as a workaround because your usage habits have molded around these limitations. It's just "how it is" to you and you don't give it a second thought... When you have done it the other way, it's clearly a downgrade...
3) Giving Siri time... Dude, it's been almost 3 years... LOL It still lags behind the competition in speed, accuracy and usefulness. It is what it is...
4) -->"Why use a phone to transport files in the first place? USB flash drives are cheaper and work in practically everything with a USB port. "
So does an Android device. Why would I want to purchase and carry around a separate device for file transfers? I am already carrying my phone, so why not just use that? Plus, having it on my phone allows me to go grab one of the files and email it to someone if I had to, whereas the USB drive has to be plugged into a PC somewhere to do that... Again, you are coming up with extra hardware and processes to account for a glaringly lacking, but simple feature that is missing on the device. Sure, you CAN do it that way, but why would I WANT to? Might as well burn a CDROM while I am at it... Anyone got a spare 3.5" floppy disk I can borrow?
5) Accessibility features... Color profiles and color inversion have been part of Android for almost 2 years. iOS is getting them in September. Android also supports full talkback, braile via BT and all sorts of stuff for disabled folks... This kind of makes my point... Features that you are pointing out are good and that you like are coming, you weren't even aware have already been on the market for years with the other camp.
I am not trying to be a ****. I am just saying that in most(but not all) cases, Apple fans don't know what they don't know. They know Apple, their usage is modeled based on what Apple gives them to work with, but they usually tend to not know what the competition does, and so they think Apple is beta testing a "new feature" when in fact, features like that have been standard on Android since version 5... Lollipop... Almost 2 years now... That's all I am saying...