This is an amazing list!
Thanks everyone for contributing so far!!! Let's keep this going~
Love So Life - comedy, slice of life
Taiyou no le - drama, slice of life
Crayon Days - comedy, school life (college)
Love hina - slice of life, Ecchi, Romance, Comedy
Suzuka - Sports, Romance, Slice of Life, Ecchi
Say I love you - slice of life, romance
Ten Count(yaoi, smut/ecchi), Tomo-chan wa Onnanoko!(slice of life), Nana to Kaoru(ecchi), Koe no Katachi, and Watashi ga Motete Dōsunda. There's a lot more I'm into, but these are my top 5.
-Tenshi Ja Nai!
-Any of the Alice in the Country of series (otome, fantasy, romance)
-Sugar Sugar Rune (drama, magic girl, romance)
-DearS (harem, romcom, ecchi)
Nanohana no Kare - tragedy, school life, drama
Tsubaki-chou Lonely Planet - school life, age gap, slice of life
Black Bird - fantasy, tragedy
Wotaku ni Koi wa Muzukashii - career life, slice of Life
A lot of stuff listed here is hella old and I respect it.
Feel free to provide your own suggestions