On Android, I use a 3rd party app called Pushbullet which is also installed to my PC. When I'm at my PC, my phone's activity can open pop-ups in the corner of my screen allowing me to send and receive SMS/Whatsapp/Facebook Messenger etc, push files remotely, be alerted to phone calls and so on. It has shared copy-and-paste, so I can copy text on one device, pick up the other and paste it there. All of this happens in just a couple of clicks: very fast, very easy. This is just one of many apps that make my Android phone and PC feel more unified. Windows and Windows Phone need to be strongly bonded like this, or more so. The Start Menu is so much like a Windows Phone that for a while I wondered if MS might allow WP users to configure a second Windows button on the desktop to bring up a copy of their phone with all of its functions.
In the OS itself, I really like having three panels, with my main phone face and then a swipe to take me left to a pane of opened widgets (much like having Live Tiles), or right to a ton of app icons. If I don't like that, I can have a big scrollable app list in a panel, or fill the main pane with responsive widgets if I want, or just slim it down to one or two panes. Nova Launcher offers a huge amount of control, and the range of launchers has become a big strength for Android now. I can see why MS would like a fairly strict design language for its phones, but frankly it hasn't stopped users from making eyesores with it. Maybe they ought to open it up now for users to have as much control as they have over their home PCs. The classic Windows 10 look can still be the default and the one that gets pushed in advertising, but if it sells more phones to allow people to really control the look (and, perhaps more importantly, if it persuades other manufacturers to come out with their own distinctive Windows Phones like they do with Androids) then maybe that's to everyone's benefit.
Everyone needs to look at Drupe and think about incorporating what they've done into the phone OS instead of a dialler. The way you open it, the way it's always there everywhere you go, the way you can drag a contact onto an app icon and immediately open up a conversation with that person... it's one of the most impressive things I've seen in my short time on Android, and I think WP is uniquely well positioned to make that kind of feature fully mesh with its OS.