:3 for my self, it would be One Punch Man, Steins;Gate, Chaos;head, Sayanora Zetsubou Sensei, Bakemonogatori series, and To Love Ru.

Although a few others i have seen also influenced me, but really held more of a focus on musick(sic) :3

Eureka SeveN, Cowboy Bebop, Code Geass, Blue Exorcist, and all of Hiroyuki Sawano's music compositions. Love his music. If you don't know, he composed: Blue Exorcist, Attack on Titan, Gundam Unicorn (my fav), Guilty Crown, and so many others. Look him up.

Whew... Um that is a difficult question to answer.
Probably one major anime that inspired me to write is
Natsume Yuujinchou~
But, majority comes Studio Ghibli from Hayao Miyazaki
(especially Spiritual Away and Princess Mononoke) #Love them
Fushigi Yuugi, always stay in my mind while I write (mostly because its fantasy-theme and character diversity).

Attack on Titan all the way...

Gintama, influenced my writing by quite a lot, and how I began to develop my characters. Kuroshitsuji, made me love a lot about inheritance and the small traits that influences people and the grin sense of style.