I've been using the N9 and N6 with keyboard almost exclusively for the past 10 months. I probably spend about 4-8 hours a day working on the devices as my job is full time computer oriented.
I was interested to see if Android could be a productivity OS. I have a lot of requirements, photos, photo editing, writing, both in documents and HTML, WordPress administration, email, payments, invoicing, spreadsheets, etc etc.
From my point of view, and with the caveat that there is a steep learning curve, Android is now completely natural as my work OS. I have a Chromebox desktop for those desperate times, but for the most part, android is my go to device.
When I see something like the Pixel C, I'm really excited. While I would love something like the Pixel Chromebook, the size and weight were a bit of a turnoff. I like to keep it light.