Hey hon, I've got a pile of rec lists which I did a couple of years ago to keep track of my favourite fics. They're grouped by genre and there's about 350 in total. sparrow's honking great rec list (http://www.livejournal.com/tools/memories.bml?user=sparrow2000&keyword=My+recs&filter=all).
There are some broken links where folk have taken their fic down or moved servers, but I'm in the middle of trying to fix these.

Okay, having pimped everyone else I'll be shameless and pimp myself *g*
My Perceptions 'verse is S3/4. Spike comes back to town early and sees Xander and Willow fooling around. Let's just say Lovers Walk didn't happen.
Perceptions (http://sparrow2000.livejournal.com/?skip=10&tag=ttm+perceptions). Sequel is Diversions (http://www.livejournal.com/tools/memories.bml?user=sparrow2000&keyword=Diversions+%28Perceptions+sequel%29&filter=all). Sequel is Realisations (http://www.livejournal.com/tools/memories.bml?user=sparrow2000&keyword=Realisations+%28Diversions+sequel%29&filter=all).

I'm also pretty fond of Daddy's Boy 'verse (http://www.livejournal.com/tools/memories.bml?user=sparrow2000&keyword=Daddy%27s+Boy+%27verse&filter=all) which is vamp Xan.

You know thismaz from writercon. For some really top knotch Spike, Xander goodness check out Blood on a Sundial (http://www.livejournal.com/tools/memories.bml?user=thismaz&keyword=Blood+on+a+sundial&filter=all) and Ice cream 'verse (http://www.livejournal.com/tools/memories.bml?user=thismaz&keyword=Ice-cream+%27verse&filter=all), you won't be disappointed. All her other stuff is in my rec lists.

I hope you find some stuff here to encourage you to dive back into the spander goodness *g*