Haha, 0. The Bayonetta games are on my maybe list. but for now I don't own them.

On 3DS I own Virtue's Last Reward and Phoenix Wright: Dual Destinies, which are both rated M by ESRB, though I believe only 16 by PEGI which as I'm from Europe, I guess is more pertinent. Therefore I don't own an 18 on either console, nor did I ever own one on Wii or DS I believe. The age rating is not something I particularly worry about - it's the quality that concerns me more.

3 of 5 games so far. I got my Wii U in September.

MK8
AC4
Bayonetta 1 + 2
Hyrule Warriors

Is that a problem?

out of 12 games we own only zombiu, ass creed IV and maybe trine 2? not sure of that ones rating

Of course not. I was merely curious.

You own AC4 but not SM3DW. Of course that's a problem!!

I'll probbaly get the next big 3D mario Wii U game. - hoping Galaxy 3 or something.

But I wanted to try AC series.

What worries me more is the lack of Donkey Kong Country Tropical Freeze... :P

ZombiU and Darksiders 2 so far. I will get Bayonetta 2 sooner or later.

None. Bayonetta is not my cup of tea. Any other good M-rated gameon WiiU is also avaliable on Steam for a fraction of the price.

I have:

ZombiU (one of my favorite games!)
Bayonetta 1 + 2
Assassin's Creed 3
Assassin's Creed 4
Mass Effect 3

Edit: Darksiders 2 as well! :)