WARNING SPOILERS AHEAD
I just finished watching all 24 episodes of Fate/Stay Night (yes its written that way, with a slash). I would have rated the Anime a 9/10, but stayed with an 8.9/10 rating because I don’t like the ending.
Actually the ending is just fine, it justifies the series and the characters but it was too sad, and I don’t like sad endings. There are Anime’s that have sad endings, but this one shouldn’t have that kind of ending. 
To start off, Fate/Stay Night is one of the best Anime’s I’ve watched. Compelling story, a good plot, and characters with diverse backgrounds. I’ve been reading about this Anime on various forums, and many have said that this is a good series. Also on various Cosplay competitions I went to, I always see cosplayers cosplaying characters from this Anime. That’s when I got interested on watching this. I knew my cousin have a copy of this Anime, so I borrowed his DVD to watch it.
Fate/stay night chronicles a two-week period in the life of Shirō Emiya, an amateur mechanic who attends school called Homurabara Gakuen in Fuyuki City. Ten years ago, Shirō was caught in a massive fire hazard that incinerated his parents and consumed a large portion of the city; as he was dying, an enigmatic man discovers and treats him. This man, Kiritsugu Emiya, decides to adopt him, though the two maintain a distant relationship because of Kiritsugu’s frequent departures from Fuyuki City. One moonlit night, Kiritsugu and Shirō have a discussion outside of their home, and Shirō discovers a fact about his father that Kiritsugu was actually a mage.
Unknown to Shirō, Fuyuki City is the setting for a secret and violent war among competing magi. For the past two centuries, seven sorcerers have gathered and engage in a Battle Royale, each gambling his or her own life to obtain the Holy Grail, a legendary chalice capable of granting wishes. The past four Holy Grail Wars have typically occurred every sixty years, with the most recent concluding a decade ago, but the fifth war has eerily started prematurely.
Each of the sorcerers, better known as Masters, are aided by one of the seven summoned spiritual familiars known as Servants, who are the reincarnations of legendary souls from all across time. These resurrected Epic Spirits (英霊, Eirei?), possess superhuman characteristics and wield powerful artifacts or abilities called Noble Phantasms (宝具, Hōgu?). A Noble Phantasm’s hidden abilities may be released by invoking its true name, but casual brandishing of a Noble Phantasm is best avoided, for symbolic Noble Phantasms usually belie a Servant’s identity, diminishing that Servant’s competitive advantage. Specific legends may be summoned with the aid of catalysts, which are artifacts, ideas, or experiences similar or of value to the desired Servant. Only one Servant can be summoned in each war from one of seven classes: Saber, Archer, Lancer, Berserker, Rider, Assassin, and Caster. (wiki)
That’s where I met Saber, a charismatic and proud knight that lived hundred years ago. Although she might seem a little bit cold and usually resorts to fighting, she has a good heart and actually cared for other people. A somewhat battle hardened female that only lives to fight in battles with her sword, Caliburn.
Her full name is Arturia Pendragon, and her creation as a character was inspired by the legends of King Arthur. Arturia is the daughter of British King Uther Pendragon and Igraine, a former Duchess of Cornwall. At her nativity, Uther realizes his subjects will never accept a female as a legitimate ruler, and decides to not publicly announce Arturia’s birth or gender. She is entrusted by Merlin to a loyal knight, Sir Ector, who raises her as a surrogate son. When Arturia is fifteen, King Uther dies, and with no known eligible heir to the throne, Britain enters a period of turmoil following the growing threat of invasion by the Saxons. Merlin soon approaches her, explaining that the British people will recognize her as a destined ruler if she withdraws Caliburn, a ceremonial sword embedded in a large slab of stone. However, pulling this sword is symbolic of accepting the hardships of a monarch, and Arturia will be responsible for preserving the welfare of her people. Without hesitation, and despite her gender, she draws Caliburn and shoulders Britain’s mantle of leadership. (wiki)
I would have loved to see both her and Shirō Emiya got together, but fate wouldn’t have it. That’s the reason why I don’t like it’s ending, because it’s just so sad. But from the beginning of the series, I’ve already knew (and hinted) that they are not meant to be together because, Saber is already a ghost from the past. She is only a being that was summoned to participate in the holy grail war, and would eventually vanish after the war is over.
Well, that’s Anime for you. A lot of surprising endings, and some ending we don’t wish to happen. Saber, is one of the Anime characters I wouldn’t forget. Don’t worry though, Belldandy is still my number one. 
I agree with the author of this completely. I didn’t like the ending but that is only because I’m not a fan of sad endings. It stays true to the characters though. Even though it has a sad ending I still rate it as one of my favorite animes.
I hate sad ending………. I wan Shiro and Saber to life together.. That is the ending i want!