Android. I like being able to install apps from places other than the official app store. Do I do it often on my phone? No. But I also have an Android-powered retro handheld gaming doodad (Retroid Pocket 3) and that's full of all kinds of homebrew, from Sonic fangames to emulators to a sourceport of Mario 64 that could never be gotten from the Apple appstore.
Do I like Android? Yes, but as much as I used to. I used to really look forward to exploring a new version of the OS, but over the past five years or so there's been a steady march to iOS-ify it and dumb it down. Now, when I install a new version of Android, I get a sinking feeling in my stomach as I see all the nifty stuff being removed :(