I think it was just the whole Spike-constantly-getting-hurt thing, as well the not-being-able-to-fight thing. I love Spike hurt just as much as the next gal (oh GOD do I), but the helpless part of it grated after a while. Doh! Of course, when I was originally reading it, I was in a pissy mood to begin with, so it could be me. xD *adds it to list of stuff to read*
OH yeah and the uncle too! Her uncle was kyoooot! That was really the thing that kept me going after a while, those two OC's. Odd, isn't it? xD