I have seen quite a lot, but favourites tend to be what I have rated highest, or stay with me.
Kanon (2006) – This was the first of a genre for me with such romance, and such with an excellent blend of comedy and tragedy, I stand by in saying that I cried and am very happy for it.
Clannad After Story – I might include the first season of this also, but the second is why I will include it connection to the above. It everything in Kanon, but taken much further that it can kind of leave a scar at one point, maybe even depression, but also very funny.
The Melancholy of Haruhi Suzumiya – Artistic, this show along with the ones I already mentioned above is done by the animation company, Kyoto Animation, and I think this was their real masterpiece. There are multiple ways to watch this show, an original broadcast order, and a chronological order, but I think the original adds a great level of mystery that fills in holes as it goes along, putting the climax that explains a lot at the end rather than the middle. Episode 0 is certainly noticeable for the characters making a purposely bad movie which actually has a lot of depth in it. The second season has some issues, but the movie is absolutely phenomenal.
Kokoro Connect – Absolutely surpassed expectations where it does a great job at breaking the cast of characters apart so we can see what they are made of.
Madoka Magica – The magical girl anime that took everyone by storm, it is deceptive in how it may appear at first, what looks like a childish tale of cliché elements becomes something much deeper. Redefined what magical girl anime could be referred to as.
Black Rock Shooter (TV) – A fusion of psychological elements that draw me in, and what I consider amazing CG action scenes, it is not very long, but I think it hits very hard.
Barakamon – Something that I could make me laugh so much I could cry. An incredibly fun anime about an adult man and the friendship he makes with a young girl on a small island, and with the various other people. It is really something special that alone in comedy I have to award it better compared to others I also love with comedy, and there are actually some rather interesting subject matter.
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Through dream I travel, at lantern's call
To consume the flames of a kingdom's fall