What? Like, I love Bloodlines, don't get me wrong, but it's hardly the pinnacle of ImSims - I see debate as to whether it even counts as an ImSim. It certainly has ImSim elements, but your ability to actually interact with the physical world in bloodlines is much less than what I'd claim is the gold standard, that being Deus Ex, and your ability to tackle things from whatever direction you care for is also much more limited. It's got a great degree of player freedom, and an expansive and fairly meaningful set of choices but that's not all that makes an ImSim.
It's just what makes it a great game. except for all the parts where it's a shit game because it's famously not great in a lot of regards