Which archive are you reading? I ask, 'cause I write a rather tough, smart, snarky Illya, who's not prone to behaving like a twelve-year-old girl. Most of my stuff is on my own site: http://przed.com/fic . And I strongly recommend Taliesin. She's a lovely writer (and my former main zine editor) and does a very tough Illya. I think most of her stuff is up at her own site, Taliesin's Reach

As for flashslash, now you've done it. I've just written one of the damn things. I'm blaming you. Like officially, on the post and everything. *g*