So far, it's definetly Demon's Souls, as it's not only my favourite RPG this gen, is also my favourite game this gen.
Why you ask? Because of the amount of versatility, atmosphere, tactics, feeling of vulnerability and accomplishment, immersion and overall awe that every second playing the game offers.
When you're up exploring the horror filled Tower of Latria, hear that Bell chiming sounds from around the corner, you're immediatly filled with that sense of dread of what's to come xD
Plus, what other RPG allows you to be pretty much everything that you want, in the same character, without having to start over? None this gen, that's for sure 
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
