From this gen: Wii U + PS4 + PC + 3DS + Vita
I've considered an XB1 more than 1 time but I don't have enough time for my current consoles so I couldn't justify it at that point.
If the exclusives I'm interested in (PvZ GW, DR3, RotTR, QB) didn't end up on other platforms I would've been forced to buy one though.