I've had both BB (a number of devices) and Android (also a number of devices). For me, Android wins hands down...not even close. I would probably switch to iphone (never) before I went back to BB. The ONLY thing BB has over Android is longer battery life, because it does everything so slowly. And who cares about BBM? That's so 2008!
It basically comes down to this...do you want to like Android or not? If you do, you'll find all the many alternative ways there are to do things on Android and quit hating the way your calendar is not exactly the same, or your dialer is not exactly the same, or your notifications are not exactly the same, etc... You have been held captive by BB's limited way to do everything on that phone. Open up to all the apps that may not be identical, but get the job done in an assortment of ways, instead of the one way that BB gave you. If you want to focus on how much you hate how it's not the same, then sell whatever you bought and get another BB. It's no different than a major Windows update, it sucks at first because it's not like the older version, then after you get used to it, you'd never want to go back.