My thoughts on F/SN:

Loved the original series when I first watched it. And it's thanks to the series that I eventually played the (far superior) Visual Novel. For those less familiar with Fate, this series essentially covers the first of three arcs from the F/SN Visual Novel (with sprinklings of elements from the others, but essentially its the first route). Studio DEEN later produced a movie too, which more or less covers the second arc, Unlimited Blade Works.

A problem a lot of people will have with this series now is that the prequel series, Fate/Zero (animated by studio ufotable rather than DEEN), is just so much better. I recently tried re-watching this series and just found it painful. The mood and pacing just don't seem well conveyed. The animation quality, while not terrible, isn't amazing either, and a lot of key scenes that are supposed to be pretty epic just aren't. It doesn't help that the Fate arc is generally agreed to be the worst of the three as well (A lot of people find Shirou very annoying, which he can be, but he's at his absolute worst in the first arc. He's not too bad in the other two).

In short, I don't think F/SN is a bad series and had it not been overshadowed by the far superior adaption of F/Z I doubt many people would think so either, but ufotable have shown us just how good this particular franchise can be if put in the right hands.

ufotable have said that they will be working on a new Fate project in 2014. Whether it's a full reboot of F/SN or someone finally animating Heaven's Feel (the third arc) remains to be seen, but regardless I'm excited!

Incidentally, the F/SN Visual Novel was recently released on the Vita, and each arc has a new opening video animated by... ufotable! Maybe a little teaser of what's to come...? ;)

http://www.youtube.com/watch?v=biL1Dbe6BC0 (Fate)
http://www.youtube.com/watch?v=GGSRdtExzkw (Unlimited Blade Works)
http://www.youtube.com/watch?v=Cp3EfuYJ9d8 (Heaven's Feel)