The manga isn't that far. I just wanted to get into the Fall anime season by knowing a little bit about what I planned to watch. At the time Hyakko only had 4 chapters translated. Have you tried Skip Beat! or is that not quite your thing? It's shoujo and it's a comedy/romance manga.
If you play the game she can be good or bad. In the anime it follows the "Fate" route and she has an evil master so she's bad. The servants aren't necessarily good or bad, but more or less influenced by the masters. Regardless, both Saber and Rider are hugely popular. By the way, your current avatar is awesome. I LOVE Hyakko. The manga is kind of... Sketchy, but it's unique and I don't care about quality in comedy manga all that much.
To be honest, I only love the characters. I'm not sure what the whole FSN fandom is about, but I'm not a part of it. Even so, I watched the whole series because Archer, Saber, and Rider were some of my favorite characters ever. Shiro just drove me nuts and almost forced me to drop it. My Christmas gift had Rider in it so it makes it Awesomesauce.