FANFICTION RECOMMENDATIONS PLEASE!!!!!

Tell me your favourite fanfictions. Underrated, overrated, m/m, F/F, F/m, smut, no smut, Romance, no romance, short, long, very long, any genre, whatever fandom, WHAT-SO-EVER. Need the best fanfics that you can't get out of your head. Your comfort reads or the ones that made you sob for a fortnight. Yap about them or only write their names. idc. My nights have been way too consumed in sleep. I need something to STAY AWAKE. (Also my midterms are soon and I'm having fanfic cravings so)
(aside from this, do tell if you have a specific fanfic with mutual yearning SO BAD AND SO SLOW it nearly made you have a fit)
ε=ε=(ノ≧∇≦)ノ