I suppose I can say this with some honesty, since I watched the Tsukihime anime twice years before I even heard it was a game, and played it only recently. The anime itself was a bit of an anomaly when you compare it to other anime in general - the feel was melancholic, and that's all. Literally, all. There's minute changes in pace and presentation, but all in all, it's just an even substance of varying occurrences represented under the same emotional charge. The anime made a lasting impression through being emotionally single-tracked rather than anything else, really, which is hardly what the original piece was.
Also, Akiha > Sakura. Faget.