I recently started testing Wayland for my every day desktop usage. So far it is quite pleasant. Gnome 3.16 is really well integrated with Wayland so I don't miss X.org. It's really good that I commonly forget I'm using Wayland.
But, of course, there are a few very funny things to notice :-)
1.) Dialogs appear in the top left before they are moved to the appropriate location (e.g. the middle of the screen). This took a few times to get used to, but it's not an issue.
2.) Alt+Tab switching to gnome-terminal causes it to think the key 'd' is pressed. Typing 'd' solves that. I've seen that in the past before with the 'Tab' key under X.org, so it's different, but not really new.
3.) When suspending the system, resuming it and attaching a second monitor, I cannot perform mouse clicks in IntelliJ 14. This is really funny for me. Moving the window to be in between the monitors, the clicks on first attached monitor work just fine, but on the second monitor it just does nothing. It's even better that I can still click the background just fine (e.g. to change the wallpaper).
4.) Sometimes IntelliJ loses its ability to receive keyboard input. The mouse works, but typing just does nothing. Alt-Tab switching to any other window and back solves that. It seems to be related to modal dialogs opened by IntelliJ, but I could not find an easily reproducibly test case.
As said, so far it works really flawless. I'm pretty certain that there is lots of Xwayland-magic involved, as e.g. Chrome does not nativly run on Wayland yet. But it's not that I would notice that as a user. I'm really happy to see how well Wayland and Gnome are doing their job.