Seeing as this game is the reason I have a PS4, it's likely not at all surprising that it's in my top spot.
I wasn't too much of a Souls fan, even when I started getting into Twitch and mainly just watched Dark Souls speedruns. I could appreciate how difficult the games were, but when I first played Dark Souls 1 I found it nothing but frustrating. Bloodborne had flown completely under my radar when it was announced. I had no idea what it was, or who it was made by until a few of the streamers I had started watching on Twitch all got the game and started playing it. After watching them play the game, I knew I had to have it as soon as possible, and that eagerness to try it for myself didn't die down until I had eventually finished the game.
I didn't have a PS4 when I first played it at a friends house, but I adored the game and only wanted my own copy more after that, luckily I didn't have to wait long before I had it! I transferred my saves over and kept it up, dying over and over of course, but unlike my experience with Dark Souls I could finally see why people loved the From Software games. The frustration that had stopped me from playing the Souls games had become determination. I liked this game so much, I just had to see every part of it, and the sense of accomplishment that came with beating every challenge the game could throw at me made it all the more rewarding. While this games seems simpler, or perhaps just more streamlined than the Souls games, that might be one of the things that drew me to it more than Dark Souls. While there are less weapons, and outfits to choose from, they are almost all completely fine choices when it comes to beating the game. The faster paced combat, and the easier selection of character builds probably makes this the best entry level From Software game. The difficulty is still present in every other aspect it seems.
After I had finished the game several times, with several characters, and played it co-op with a few friends, I played less and less, and eventually stopped. Then the DLC came out...
The Old Hunters DLC for the game features more than one of the games 'best' bosses, and a multitude of new delightfully absurd weapons to maim beasts with. The OST is great, and particularly brilliant in a certain DLC boss fight. The low-key story elements give an air of mystery to the dark, and disturbing world of Bloodborne, and the lore is fairly interesting. Should you look deep enough into it, it's likely it would lead you to numerous insights and details in the game that might surprise, and perhaps even make things seem more disturbing and gruesome than you had first imagined.
All I have to say is that after playing this, I'm very much looking forward to playing Dark Souls 3.