I may regret asking y'all for opinions, but here goes. The following is a bit of theme/fluff text. I want to make sure that it gives some idea of what your characters can do/what motivations there are, without making it seem like there is a strict YOU HAVE TO BE LIKE THIS. Does the follow give you any thoughts on what your character might do in game? Does it make you feel like there is only one or two specific kind of concepts that are workable?
(Also I know there are some typos and odd wording, I'm going to clean it up a little more once I know if I need to retool completely or not.)
To say that shifters have a culture is not completely correct, nor completely wrong. There are many different cultures within the Changing Breeds. The animals and the peoples are diverse. Different breeds have different ways of life. Within the same breeds there are even different ways of life. There are a few key elements that unify all breeds, however. Even if the approaches to them are different.
These key elements are their animal selves, their hidden natures, the touch of magic that all shifters have, the touch of spirit that all shifters have, and the saddening or maddening truth that human beings are slowly killing all magic in the world.
The approach to dealing with one's animal self may be different from breed to breed but it is true for everyone. Each and every shifter is part human and part animal. One may try and walk a path of balance that holds each half in perfect balance, or a shifter may favor one half over the other. One may strive to be more and more human, denying their animal self. Or one may strive to become the perfect animal, denying their human part. Every shifter is some combination of human and animal.
For better or worse breeds keep themselves hidden from humans. There are three subspecies of tiger that are already extinct and no one has seen a breed of those tigers since their extinction. What of the dodo? Or the western black rhinos? All hunted for sport, or out of fear. If humans found out about people who could turn into animals? Would they go hunting out of fear? Or hunting out of sport? Not many a breed wants to find out which would be the case. Some breeds may hunt humans in secret for revenge. Some breeds may cautiously clean up other people's mistakes. Other breeds may want to rebel against the secrecy of their hidden natures but it is rare for a breed not to know there would be consequences of humanity finding out.
All breeds have a touch of both magic and spirit within them. Is it not magic to change from a human to be a giant bear? Is it not an animal spirit that lives within the breed? All things have a spirit, the breeds know this. Whether they believe their animal part of them is spirit or natural, having that animal self allows them a higher connection to the world. They are more in tune with the magic, with the spirit of it. Some breeds may approach the world in a shamanistic view because of it. Some breeds may throw themselves completely into magic. While some might try and find a balance in it. Balancing spirit and science. Magic and technology. Their more intune-selves with the human blindness of the world. The approach to magic and spirit vs the modern world is different for each individual breed.
The last unifying part of shifter culture or society is the knowledge that magic and the spirit is slowly being killed by humanity. It would be easy to say it's all about the planet being killed. Or it's all about the overabundance of technology. But those mindsets are just small points of view. Only one part in the problem. Or one idea on what the problem is. It might be the direction of the planet. It might be the overabundance of technology. It might be both. It might be human belief that magic doesn't exist. It might be that it is time for magic to change, to be bent to science's will. A shifter might believe the destruction of nature is the cause for the lessening of magic and the spirit world, and thus try to preserve or fight for the planet. It might be that a shifter fights back against technology itself, believing that smartphones and computers take all of the mystery and magic out of the world. Or perhaps a shifter might believe that magic can be found in technology now and embrace it. Might try and warp their technological gadgets into even more magical- or if they prefer scientifically advanced -objects of use. There are different approaches, different views, but there is one commonality. Magic, and the spirit, seems to be dwindling.
The rest of shifter life may vary and change from breed to breed but those key elements remain.
I would like that. I might just go with the old Port Angeles grid, tho. Given how much work other stuff will be.