I own...
MY FAV; My MK2 Arcade cabinet(because MK2 is my favorite game period, and worthy to have as the arcade machine) I honestly have to say other MK2 experiences(home versions) are but dim reflections of the machine experience(especially in your own home). I LOVE MY MK2 Cabinet!! One of my best purchases!
Now onto the rest...
SNES: MK1, MK2, UMK3. Those were my first MK games.
GB: MK2, MK3, MK Advance
N64: MK4
PS1: MK:MSZ, MK4, MK Trilogy(love that game!)
PS2: Deadly Alliance, Deception, Armageddon(with UMK3), Shaolin Monks(best outta the PS2 MK era), Midway Arcade treasures 2(MK2 and MK3)
PSP: Midway arcade classics(MK 1,2,3), MK unchained
PS3: MKvsDC, MK(2011), MK:Arcade Collection, MK2(from PSN)
IPOD: UMK3
I had a Dreamcast but Never owned MK Gold, but I played it. Never owned Special Forces for a reason...
That's all my MK game collection.