The fourth season begins when Aidan realizes that there is a new vampire coach in town. Josh's new life is shifting due to further problems. There are new powers that Sally takes as she is newly acquired and sends her to a strange place.
Each season, Being Human has been able to reinvent itself with stories fresh and completely different than anything being done on the other crop of supernatural shows that have popped up around it.
The finale touched on a little of everything. It was like a cake made with only the essential ingredients and then topped with icing (the good cream cheese kind, not that overly sugary crap) and served to fans on a fancy dish.
Given the choice between an overly happy -- read: sappy -- ending that gives everyone exactly what they want, I'll take a bit of bittersweet if there's depth and meaning behind the loss, and I think Being Human nailed it there.
Being Human was able to bow out gracefully. If TV shows had souls, then Being Human's would be greeted with the biggest and shiniest door it could possibly receive.
This beautifully ridiculous show that at one point literally had Amish vampires wrapped up in cocoons in a barn has turned out to be one of the most emotionally gripping pieces of television I've had the privilege to watch.