Okay I'm going to rec a total classic today. And I DO mean "classic":
Sew The Chicken Series by Kim Wylie. It's Buffy/Giles and rated FRAO. The link takes you to part one and subsequent parts are linked at the bottom of each page. There is no summary but let's just say it all starts with an oddball dream that Giles has - and what a dream!
I love this fic because it's both funny and serious. The funny bits WILL have you laughing out loud - and the great thing is that the dialogue is perfect - it all FITS the characters brilliantly.
Enjoy!