I've dabbled in all previous Souls games. The furthest I got was with Demons Soul. Defeated a bunch of bosses, and then i lost interest. I think that was because I was reading through the guide and the world tendencies and needing to upgrade weapons a certain way and finding certain shields seemed daunting at the time. That was partly my fault I guess, but I wouldn't have gotten that far without a guide. Tried Dark Souls, and the framerate was off putting. Tried Dark Souls 2, and found the environments to be kinda bland and the enemy designs to be not so interesting. All 3 souls game, I really tried to understand the gameplay, tried to get good with the parrying, rolling and what have you, and it just did not seem to work for me. Also experimented with different classes but didn't manage to get into it.
I played Bloodborne last night for 2 hours and the game clicked like none of the previous 3 did. I was dodging all over the place at the start but by the end of my 2 hours I started to wait and dodge according to enemy movements. The overall world seemed much more alive and interesting to explore. The game is hard but I was compelled to play more and start again after each death. Mind you I haven't gotten to a boss yet but so far I'm just having fun exploring and learning how to play better.
TLDR - The best From Software game I've played thus far and looking forward to play more.