I'm really liking Sony at the moment - pretty much all their 2014 phones and tablets have been great. And not too much crap pre-installed. May even turn me away from a Nexus if they continue into 2015 at this rate (I'm not a fan of the Nexus 6).
And their commitment to "tinkering" via AOSP is great (even with the disclaimer on their site: "As usual, you should be aware of that this software is not intended for daily use as there are important limitations. For example, the camera is not working and the modem is not enabled, which means you cannot take photos or make phone calls."