I for one am rather happy with Ubuntu. Can't stand Unity of course, and KDE has never been my cup of tea (have given it a few tries, given up every time, it just didn't do what I wanted). I was really happy when we got Ubuntu Mate, that just does what I want, and gets out of the way.
But with Ubuntu 16.10 I'm really looking forward to try Lubuntu again. The old LXDE is a bit too... lacking in small convenience features. I hope LXQt will improve on that (plus, I'm a Qt fan in general). If it's a let-down (beta 1 still has LXDE, I believe, so not trying it out yet), I suppose Ubuntu Mate will continue to give me the naughties UX.