Never played any of the other Souls games but everyone is so hyped.... So shall I buy this?
Personally, I feel like Souls games, this included, are games where you should not buy them on a recommendation. Rather, I feel these games are fairly 'niche.' Meaning some people swear by them, but many do not understand it. These games are incredibly challenging, have very precise and detailed gameplay mechanics, and an immensely expansive lore that is not obvious to the casual player.
In my opinion, if you are unsure whether you would like this, you should not buy it. That said, if this game interests you and you are just being timid... try it. Nearly everybody agrees that all the Souls games are top quality for the most part, and Bloodbourne does not look like it will deviate from these expectations.