I started with iOS and after two generations of iPhones I switched to Android and never looked back. If you want to really split hairs, I've actually used two different flavors of Android too. My first Android experience was on a Samsung Galaxy and while I like it better than IOS I really hated all the stuff Samsung and my carrier added to the phone and quickly loaded the NOVA launcher to overcome most of what I didn't like. Once that phone needed to be replaced, I jumped to a Pixel. I have been VERY happy with my Pixel, and will not go with anything else.
There are many things I like about Android. The ability to make it do exactly what I want, when I want, with the app I want is a huge plus. I live in a Google world, so the integration between all the Google apps is huge plus. Widgets are another great feature which allows me to access data or do things with apps right on my home screen without having to even open the app in the first place.
When I had an iOS phone I simply used it as a phone and maybe played a few games on it. When I moved to an Android phone, being able to set up widgets and other little changes allowed me to actually use my phone as a tool to manage my life beyond simply communicating. There was something about the way it's designed which "clicks" in my brain and makes me try to take advantage of all it's features in ways iOS never did. Oddly enough, I don't pay games on it hardy at all...
This is by no means a bash on iOS devices. I still use an iPad because Apple's tablets are far better, and actually cheaper, when comparing devices of similar performance. However, my iPad is for casual internet use and entertainment.