I'm doing an experiment with Android as well and got one the other day...
Things I don't like:
1) Settings menu is not laid out well (granted, the order of settings in WP8 is not great - Win 10 should at least help the organization)
2) In my car, Bluetooth SMS is garbage... I can get it to read aloud the last text message, but have to hit a button and say "read message", it then won't let me verbally respond, I have to jack with buttons and scroll through available canned responses on the radio screen (not a good thing to do while driving). My WP lets me verbally say read it or ignore, and lets me do voice to text to reply.
3) scrolling left and right within apps drives me crazy, like the settings app you swipe left or right and the screen starts to go and snaps back to the same screen you were on... seems the sensitivity is too low as you have to swipe almost all the way across the screen to get it to work at times.
4) Scrolling up and down in apps seems to be too slow and too fast... to slow for normal scrolling and too fast when you try to scroll up/down quickly... seems to be all or nothing.
5) Apps seem to overly rely on taps to the top of the screen. I don't seem to have to adjust my hand to reach the top as much on WP.
6) FB app sucks and without the Twitter/FB People app, I wind up not paying attention to twitter at all... To be fair, the WP FB app is bad too, but the People app seems to suit my needs well.
7) Apps list seems hard to find apps at times, a single in-line list is much better.
8) Widgets are great in theory, but they look like they don't belong when they are put together... just looks like a jumbled mess.
Things I like:
1) projecting videos to my TV at the touch of a button. (WP is supposed to have this feature, but either my TV doesn't like my WP or the other way around)
2) IR port on top to use phone as a remote for my TV and satellite box (although it doesn't seem to work for Xbox One - Although you can use the separate smart glass app)
3) More apps - especially Fallout Shelter and the Fallout 4 companion app that are coming soon.
I'm giving it a couple more days, but at the rate it's going, it will be in a card board box and back at the store before the return time is up.