The three main characters of Fate/Zero: Saber, Kiritsugu Emiya, and Irisviel von Einzbern (Image taken from: fanpop.com)
Alright, the Fate series was an utterly fantastic series in my opinion. The order or publications in comparison to the storyline order is probably the only negative I truly saw. Fate/Stay Night was put out first, but the two Fate/Zero seasons are prequels to Fate/Stay Night. Despite the reverse order, I watched Fate/Stay Night, and honestly it didn't really spoil Fate/Zero but rather assisted in understanding what was going on sooner. Anyways, the entire series focuses upon a Holy Grail War amongst mages whom have summoned partners (like Saber) whom represent heroes from history and are fighting each other for the Holy Grail, which is believed to be an all-powerful wish granter for the winner of the War. Of course there's a catch, and twists in the plot and whatnot, but that's the gist of the storyline, mages with powerful summoned partners fighting for a wish granting object.
(Image taken from: emptyblue.it)
As a whole I found the Fate series to be quite interesting. Most of the story is action-based and a little bit of mind games and also a little bit of romance (more so in Fate/Stay Night and even then very slight). While I generally don't go for dominantly action-y animes, Fate kept me in with the Holy Grail War idea, the plot twists forcing the mages to team up or disperse or die if they don't decide, and the dramatics after choices are made and followed through upon.
(Image taken from: alphacoders.com)
Ruri's Rating: 8.75/10
Suggestions: C: The Money of Soul and Possibility Control, Accel World, Death Note, Gosick