I've never played a Souls game before. I own Dark Souls, and feel like playing it, but I'm wondering if I'm better off starting with Bloodborne instead? I don't own a PS4/Bloodborne, but I can see myself getting them at some point. If Bloodborne is worth playing first for some reason, that may expedite me buying them.
Since you already have Dark Souls, PLAY IT! Fantastic game. Personally I liked BB more, but that is just my personal taste. I liked the combat and lovecraft theme of BB.