I have a weakness for characters who’s defining feature is a capacity for love that for all intents and purposes shouldn’t even exist. When it comes down to it, this is why Cas is my favourite character.
Castiel is an ancient disembodied being, who has witnessed the evolution of life on earth from the very beginning, but who somehow fell in love with a human being who’s lifespan must feel like a mere blip in time to someone as old as him.
When thinking about it this way, I even kind of get why most angels are “dicks”. Why should they care about individual humans when they have been here millions of years before them and expect to still be here after humans have long gone extinct. That’s why even the angels who were more on the friendly side, always acted a little aloof. The only equivalent I can think of is a human being who loves nature and wants to preserve a certain species of insects. That person wouldn’t love an individual animal of that species, but care for the species as a whole.
But then there is Cas. Who somehow loves his human family so much, that he would gladly give his eternal life for them and has done so many times already.
Can you imagine loving something with the lifespan of a mayfly? No? Then consider the capacity for love within Cas and explain to me how some people can not admire him for the truly miraculous creature he is.