Spoiler Alert!
Like what is your favorite religion, which one makes better people (ie.Cersei and Davos) and cause the most damage or development. Which ones are just bunk and which ones are truly real.
First let me say that my opinion is biased. In no way can I come to ASOIAF without relating its religions without consciously (and even unconsciously) comparing them to my own experience.
Favorite? None of them.... but that does not mean that I don't find them interesting. The Imp stated that GRRM was raised Roman Catholic and I can readily believe it. The Faith has much of its structure from Catholicism, yet lacks any real manifestations of ever being (or having ever been) in communion with the divine. The seven aspects only seem to elicit supplication to ward off evil... or else a habitual (almost superstitious) expression of gratitude when disaster is avoided. I think GRRM is very familiar with this form of religion and I take it as a warning to the Church.
The dualistic religion of R'hllor is interesting because of the obvious supernatural expressions revealed by it's practioners. Melisandre, Thoros, and the priests in Volantis readily recruit adherents because they can show supernatural power. That's not something to be taken lightly... especially by those who plan on fighting the supernatural or fighting against tremendous odds. But the dualistic aspect is problematic... Why hasn't The Other done anything in the last 8,000 years? Why has it taken him so long to bring an assault upon the world? Why does he only attack the north of Westeros and not Essos or Sothoryos? Why is he so easily confined to just a part of one continent? If he and R'hllor are basically equal, then R'hllor must be severely constricted also. And then why did R'hllor allow the people closest to the lands of The Other to lose contact with him?
Their are other religions to be sure... The Old Gods, the Drowned God, the Rhoynish religion, the Harpy of Ghis, the eternal star riders of the Dothraki, the Great Shepherd, and many others that I've forgotten or don't know of yet. Many of the religions don't show supernatural connections, but many at least promote familial and societal ethics. Yet, the cult of the Many-Faced God stands out from the crowd. They don't promote honesty, duty, selflessness, patience, or love. They only promote revenge and oblivion. I know that Arya calls him the kindly old man, but he is a master assassin for hire. He promotes the eradication of all emotion towards life. But then how can he claim to be providing mercy? Blood is his only goal. I find him absolutely appalling.
Holy; are there truly holy people/animals like Melisandre Damphir or even the Direwolves and Dragons. The Wizards/Priests of Qqarth and Asshai.
I need to comment upon your choice of the word holy... and not because I'm a language snob, but because I want to clarity upon this particular subject.
Holy means of or pertaining to the divine... especially in a good and pure sense. I think supernatural would be a much more appropriate word. Dragons and direwolves are not of our natural world. The followers of R'hllor have power, but they have not yet shown us a direct connection to a good and pure divinity. Blood sacrifice seems the exact opposite of holy to me.
I don't think that GRRM has given us any holy characters. Aeron has yet to show us any connection to the divine... he's shown us plenty of wishful thinking. None of the High Septons seem to have a connection to the divine. The current HS definitely comes closest, but his readiness to engage in politics turns me off... and again there's no display of the supernatural.
Martin does show us that he thinks love, innocence, purity and goodness are important. Penny, Brienne, Podrick, Eddard, Dany before Mirri, Myrcella, Tommen, Arya before Joffrey, Bran before Jaime, Septon Meribald, the Elder Brother, Samwell, Barristan, and Aegon are among the best people in the story. But in an imperfect world, these people are constantly abused. And the scary part is that only R'hllor and the Many-Faced God offer solutions... get revenge or commit suicide.