I have been an avid anime watcher and found myself fascinated by them right from age old ones like Flame of Recca and DBZ to more recent ones like Mirai Nikki and what sets them apart for me, is the freedom which the animator has compared to regular movies. There are no limitations in what can happen in an anime unlike in the case of movies which can at best, showcase a mocking attempt at replicating something unnatural.
Case in Point, DragonBall Z (Spoiler Altert), an anime whose craze sent entire generations shouting in joy when Goku went Super Sayian and plunged them into dismay when Vegeta blows himself up in a failed attempt to kill Cell. An attempt to make a movie out of this anime drove the fans into a frenzy at the despicable nature of the result because it is NOT possible to have a realistic representation of the supernatural.
A book definitely has better freedom of expression as thoughts are better explained and elucidated at a pace comfortable to the reader but an anime has its advantage in the entertainment it provides simply because it's an audio-visual platform with an impact quotient that is greater.
To draft a list of anime that has impacted me is to list all the anime that i have ever watched since each once has atleast a subtle impact on me, if not by subject, atleast by delivery. But, to choose, the most impactful, they would be
1. Bakuman
An anime about a pair of students who aim to be established Mangaka ( Manga Writers ) and to release an anime in their name. It appeals to the heart of every Anime Aficionado and writer out there. It describes the state of mind of these budding mangaka through the ups and down of their career, spiced up with a romantic side story and several subplots ( read - manga within a manga - Mangaception ) and delivered in brilliant style. The heart warming story also is a great teacher walking the viewers through the process of manga writing while also showing a dramatized back story to describe the motivation of the various writers.
I am not smoldering and incompletely combusted like those guys over there. Even if it’s just for a moment, I’m gonna Burn so Bright and so Red, I’ll Dazzle Everyone.
(Bakuman)
I prefer to be a humble dreamer, with visions to be realized, rather than the ruler of people with no dreams or desires.
Mashiro Moritaka (Bakuman)
2. Shinkgeki No Kyojin
A dystopian anime that reminds you both of the joys of freedom we enjoy and the depravity of humans when confronted by danger. A cynical, dark, tale of humanity's last stand against external and internal forces. Combining advanced technology with a semi-rustic setting and extremely realistic character descriptions, this anime has it all.
We’re going to explore the outside world someday, right? Far beyond these walls, there’s flaming water, land made of ice, and fields of sand spread wide. It’s the world my parents wanted to go to.
Armin Arelet (Shingeki no Kyojin)
If you win, you live. If you lose, you die. If you don’t fight, you can’t win!
Eren Yaeger (Shingeki no Kyojin)
3. Hungry Heart
Football. Sibling Rivalry. Passion.
An anime whose protagonist is a simple character with whom any person who has ever had a rival will connect to, more-so someone with a sibling. It drives you to the depths of despair and the heights of euphoria in the span of a few episodes. Watched this way back in 2006 and has been my most nostalgically recollected anime since.
When they call my brother a genius, it's an insult. He was born talented, but they don't know how hard he had to work to be that good.
-Kanou kiasuki, Hungry Heart Wild Striker