One of the most useful and comprehensive fansites for X-Men and related Marvel available. Fabulous resource.
: : House of Cards : : The Other Side of Masks : :
Ludi is an amazing writer, period, but House of Cards is her masterpiece and the related "Thread" is a welcome additional touch. Her take on X-Men's Gambit and Rogue in the "Days of Future Past" is mesmerizing, dangerous, and inspiring in a dark world and an impossible hope for the future. Well worth the read.
: : Betrayal : : Paradox Law : : The Game of Empires : :
: : Thick as Thieves : : Blind Sight : :
The strongest, best X-Men fics I have read are Valerie J's Betrayal story arc and her Thick as Thieves story arc. In both, the writing is superb, the characterization is excellent, and the knowledge and reworking of canon is above par. Remy LeBeau (Gambit) plays a starring role in both series. For those who love reading and writing this character, her works should be required reading.