Welcome to the community, although I think you would be better served registering on The Fandom Post
instead of here since most of the community that was once in this place has since migrated over there with a few of us doing double duty. Anyway, in regards to your list, while you might have watched a lot of anime, you ain't seen nothing yet. Based on your list, I can recommend these titles based on you liking the shows on your list. So I will take the titles on your list and suggest something you might like from it. I will omit titles that I have yet to watch.
One Piece, Bleach, Naruto, Fairy Tail, Dragonball, Toriko - Give Yu Yu Hakusho
Magi: The labyrinth of magic - 12 Kingdoms
sounds like something you might like.
Darker than Black - Try Tiger and Bunny
Sword Art Online - Definitely check out Accel World
. It's great, and written by the same author.
Gash Bell - Rozen Maiden
would be worth checking out (though I wouldn't recommend the second season)
Pokemon - How does Digimon
D. Gray-man - It definitely is set up like Full Metal Alchemist
. I would watch Brotherhood over the original.
Black Blood Brothers - If vampires are your thing, Hellsing
, but it is far more bloody and intense.
Trigun - Give Gungrave
a try, although this show is much more intense.
Trinity Blood - Definitely would suggest Chrono Crusade
Inuyasha - Ranma 1/2
as it is also a Rumiko Takahashi work.
Zero no Tsukaima - Shakugan no Shana
Infinite Stratos - Campione!
sounds like something you would enjoy if you liked IS.
Witch Hunter Robin - Ghost in the Shell: Stand Alone Complex
sounds like something you might enjoy.
Marchen Awakens Romance (MAR) - Rave Master
looks like something you might like.
Kekkaishi - Give Nura: The Rise of the Yokai Clan
Blood+ (was okay, pretty brutal) - Try Ga-Rei Zero
. The first two episodes are rough, but the rest of the story is nice.
Sacred Seven - Definitely try out Eureka 7
Soul Eater - I would say Angel Beats
since it has lots of craziness in them.
Based on your tastes, here are some more titles that I would recommend:
Bakemonogatari and Nisemonogatari
Code Geass (though it's a mecha show, there is a lot more to this show that involves stuff you would like)
Fate/Zero and Fate/Stay Night
Melancholy of Haruhi Suzumiya
Ouran High School Host Club
Puella Magi Madoka Magica
Tsukuyomi Moon Phase