The thing is, unless i know someone using HTC or LG giving genuine positive feedback, it's really difficult to trust tech websites and fanboys comments
My first smartphone was Galaxy S and i've been using their phone since. Honestly, S was a horrible phone with the stock TW. But S2 was a tremendous improvements but Samsung phone up to Note 3 has always suffered from performance issue after sometime of not rebooting the phone.
I know it was partly Android's fault but Samsung just made it worse with their skin. And their camera, while taking good photos during bright light, was pretty hopeless in low light and not to mention taking too long to open.
Note 5 is so much better coming from Note 3. See if Nokia can come out with better stuff. My main concern is battery life and camera and being flagship i expect performance to be good. As for stylus, i think it's more suited for tablet cos many times i try to write something, i tend to have limited space on it hah, but one thing it's very good for is signing documents.
I love multi windows and floating screen but it won't be a concern anymore since Android is supporting it natively. And their implementation seem better and smoother.