When was the last time you used Android, which device and what made you leave?

I'm well aware this could turn into a flame post, this however is really not my intention. I often see iPhone users across the web state how much they dislike/hate Android, yet the last phone they used was a thunderbolt or something earlier. I'm curious about honest answers here, as the title suggest would love to see where people came from in the Android world and what would it take to drag you back to Android. Without any bashing, maybe we can do it in a certain format for structure, maybe like:

Android History:

Last Android phone :

Android version at the time:

Pros you liked:

Cons that made you leave:

Would definitely come back if:

Nobody have to of course have to follow this format and if this was already done, apologies.