As others have said, it all depends on the ecosystem you are comfortable with. Apple, Google, and Microsoft all have their quirks. You need to understand how you are tied to them and decide if it is worth it.
I am all Android for phone and tablet, but Microsoft for PCs. But Google runs my calendar, and everything updates across platforms.
I gave up my Nook ST e-reader when I changed over to a Nvidia Tablet as its screen does not cause eyestrain when reading). The Kindle App is limited, but for reading it's fine.
Android is more affordable for devices (yes a new Samsung will run you $700-$800, but will it perform as a flagship or an also ran?) As others have said, for Android there is a wide range of applications, most are free.
As for phones, Samsung has a reputation, but a ton of bloatware on the device which is not removable. LG makes good products and buying one level below flagship gets you a great device sure to run til the battery dies in 2-4 years. Choices, choices, choices!
- Rita