The 10 is my first android phone, been an iPhone user for about 8 years. I have to say I really love it, and have been impressed with android in general. It does have its issues and my biggest gripe is around Bluetooth audio stuttering compared to my iPhone, but it's not constant, and my aptx enabled headphones work perfectly.
I did a bit of research before getting this, and I'm sad that all the good things about this phone seem to have been ignored with the new HTC U Ultra. I really like the metal design, it's a sturdy phone, the screen is good (bearing in mind I'm ex iPhone so no amoled for me), and the 5.2 screen size is perfect for getting lots on the screen without seeming like a massive phone and being usable one handed if needed. So, really enjoying the phone now, not sure what I'd go for next year as the full glass style design of Samsung just seems too flimsy for me