Fanfiction.net has a lot of junk. It's better to look at rec-lists and awards winning fics instead of having to read 1000 very bad fics before anda find something remotely good.
link This is a digital bookshelf of some classics. And with classics I mean, anda have to read these, they're some of the best fics in the Harry/Draco fandom. I really like A Thousand Beautiful Things, the Lightning Letters and Beautiful World.
link Here is a daftar containing several rec-lists. I'm sure anda can find something to your liking there.
There also is a Harry/Draco fanfiction spot (not really active but there are some usefull link on there.)
link Edit: If anda can still find it, read Bond oleh Anna Fugazzi. Awesome, awesome fic!