I voted for the different genre choices, though I don't think that is exactly the answer I wanted to give. In the past I have used the General Request thread often enough, but if I'm looking for someone new to write with and haven't found someone in General, I will also look in the Libertine section. Occasionally I have found people there like myself, who are a little older and with whom I don't have to feel squeamish about romance, possible sexy time and/or graphic violence (and yes, I do feel squeamish writing simple romance with a teenager - it's a personal thing for me, nothing against the younger crowd who can be wonderful writers). As for the other genres though, I almost never search their request forums because I just don't think to do so.
So in short, I have used the General Request section for searches a great deal, but finding nothing there? I genuinely appreciate having the Libertine section to choose through as well, and would miss it if it 'went away.' I don't know if it would be the perfect answer or not, but Minibit's thoughts on the IC section aren't too far off for me personally.
The one thing I can think of that would make my searches easier? A function where I could auto-filter by writing level. I find myself skimming that tag quite a bit and if people don't even think to mark their writing level? I skip right over their request anyway without reading it. :( That probably sounds horrible, but since you're offering a survey about 1x1? Honesty works better I imagine... >.>