Mk8D
Skyrim
La Noire

Used to own LA noire and Skyrim on ps3 but dont own them anymore

Mario Kart 8 is the only double dip, and it was gifted to me.

But I might get Tropical Freeze and Bayonetta 1+2 in the future.

Mario Kart 8 for portability. Other than that I don't think I've bought any other ports. I probably will for Mario Bros Deluxe, because I really like the local multiplayer, and the portability/detachable controllers will let me use that more often.

Skyrim (though in my defense I never actually played my ps3 version...mind you I haven’t played the switch version yet either haha)
DKTF (regret this one...not for double dipping. I regret the fact I bought it digitally the second time)
Mega man X legacy collection vol 1 (if it counts I bought x1-3 on the 3ds virtual console and did own x 1 and 2 on the snes back in the day)
Mariokart 8
Doom (double dipped in reverse...bought the switch version second hand for an overseas trip then bought PS4 version after)
Hyrule Warriors (triple dipped this for some reason...still haven’t really played it)
Bayonetta 1 and 2 (bayonetta was probably my favourite 360 game)

And I’m currently debating okami (I’m torn between downloading or paying twice the price to import the physical version. Own the ps2 version)...
And will definately pick up nsmb u deluxe (or whatever it’s called)in Jan as I was hoping/waiting for that one.

Mario Kart 8
Donkey Kong Country: Tropical Freeze
Bayonetta 2
Crash Bandicoot N Sane Trilogy
Rayman Legends

and Im getting Diablo 3 and Dark Souls later this year.

Mario Kart 8 Deluxe
Cave Story
Mega Man Legacy Collection
Crash Bandicoot N. Sane Trilogy

I'm really bad and can't resist. I double dipped on the Switch-versions of:

• Mario Kart 8
• FAST Racing Neo
• Okami
• Resident Evil Revelations
• Bayonetta 2
• Lego City Undercover
• Rayman Legends
• Captain Toad
• Hyrule Warriors
• Steamworld Heist
• Zen Pinball

But  it's so ulitmately more sexy with the mobile option. Might rebuy Don't starve later on too. And I would rebuy Tokyo Mirage Sessions and Pikmin 3, if they come. At this point I see no point in the WiiU and would like to play all great games on my Switch.

Breath of Wild
Captain Toad
Doom
Hyrule Warriors

Also going to buy Mario Kart 8, Tropical Freeze and New Super Mario Bros U at some point. Would have bought Bayonetta and Mega Man Legacy Collections if they hadn't pulled the digital code crap

Mario Kart 8
Rayman Legends
Ys VIII
DragonQuest Builders
Disgaea 5
Almost every good Indie on the system that first launched on Steam.

Eventually getting Bayonetta 2, and Tropical Freeze.

I haven't double dipped on anything. Out of principle, I'm not going to support Nintendo's retreading games so that their loyalists get stuck with the same stuff over and over again for 5 years.