Back when Wii U was getting third party ports like Call of Duty, Assassin's Creed, Mass Effect, Batman, Splinter Cell, Need for Speed, etc, did you buy them on Wii U, or did you get them on PS3/360, or not at all?

Smash Bros. is multi-platform!

I don't own the Wii U version though. The only multiplatform game on Wii U I've had is Scribblenauts Unlimited. And I had Zombi U, which was released on other consoles later on.

I bought some since I never owned a PS3 or a Xbox 360.

I got a decent number of them, probably about 12 total.

I have some multiplat games, yeah.

I have Mass Effect 3, Deus Ex Human Revolution, Resident Evil Revelations, Batman Arkham Origins and I guess ZombiU is considered a multiplat now since it was ported to other systems? I'm assuming so anyway.

Nope, only exclusives for me.

If it's multiplat, I'll just buy it on PC or whatever platform it's on.

Nah. A lot of them I already had on PS3/360 (like Mass Effect 3, Arkham City or AC III), and after that, I still didn't really like to get any other multiplatform games for my Wii U.

Nintendo systems are mainly for exclusives for me.

The multi-platform games I currently own are Call of Duty: Black Ops II, Darksiders II, The Legend of Kay Anniversary, and LEGO: Marvel Super Heroes.   At one time, I owned Assascin's Creed III, Batman: Arkham City: Amored Edition, Call of Duty: Ghosts, FIFA 13, Just Dance 4, LEGO: The Hobbit, Madden 13, and ZombiU.

Not a single one

Assassin's Creed 4, only because it was the cheapest version at the time. Nothing else though. Not really much of a point, especially in the indie department where they're all way cheaper on PC. I would have gotten Mass Effect if the system had more than, you know...just 3. (Remember that people get PAID to make decisions like that.)