I can't believe this one hasn't been retread yet! Its by one of the fandoms staple writers, everything this lady turns out is wonderful and her knowledge of canon is second to none. The writing is excellent, and the details, emotions, and story lines are the best in the fandom.
Why I like this one? It shows of side of Feanor that Tolkien did not show us, and of course it has her Thranduil, who you fall in love with in every story she writes about him.