I'm using NodeBB now for 3 months on 2 websites. And some users have a few suggestions that you guys maybe can put in.
Night/Day mode
The theme is very white and when it's dark people want the site dark. Is it possible to put a 'moon' icon in the right corner between chat and the profile picture. When it's clicked nightmode will turn on, and the website is dark with grey text. The moon icon is after clicking a sun. When the user clicks on the sun, the daymode will turn on, and the website is white with black text (like the standard persona theme).
Sun

Moon

Icons from Flaticon.com and free to use 
Square avatars
People from my second website hate the round avatars. They want them square like other forums. Is it possible to make a switch in admin panel so you can change the avatars from round to square? It would be pretty awesome!
Closed topics
Another question was to remove the lock-icon from a closed topic. And make the topic title Like this. So users know that the topic is locked. I don;t know if this is possible, but maybe it's an idea to build it in. (not for me, cause I think it's confusing, but I'm listing all the things people said on my websites)
Remove topics/threads from recent list from a category
I have a 'bullshit board' on my forum. Every day a few topics are made in this category, and some people don't like it, when every time these threads are listed in the recent list.
Is there a way to don't get them listed in the recent list of threads? Or can it build in, in the software. It would be on our forum a very good addon.
Change to full numbers
If a thread reach the 1000 posts/views it is changed to 1.0K. Like now it's 1.1K and you can tell if there are 1102 views or 1193 views. Is it possible to change it to a full number?
And the last one!
Is it possible to change the colors of the upper bar.

Now it's white and grey. Is it possible to make the background black and the text and icons white?