However, let me reiterate one thing. I am actually a fan of OP characters. I mean, I really like Inaho from Aldnoah.Zero, for example, who essentially destroys superpowered enemies like they are nothing. And I most definitely dislike training arcs, or "I must get stronger"-driven series.
But I want to be surprised. I don't want to read something and be unimpressed by whatever the MC does. I want to be kept in suspense as to what they are going to do to solve a situation, and am even happier when they get real, tangible help from allies. But Rain... even if I couldn't foretell his every move, nothing he did was outside the range of what is ordinary for him. Sometimes he would win just because the enemy was powerless against him, not because he had to do something about it.
Take Shin'ichi Akiyama. The quintessential intellectual hero. His IQ must be double or triple of all the other characters' combined, and he pulls no punches in crushing his opponents, but even though I know he is going to win, I want to know how.
Because, frankly, I don't dream of being anything like a manga hero. I like to think of the characters as entities, or humans, facing situations and then I'll ask myself, "what would I do in that situation?" If the situation is predictable and I can understand all the forces in motion, then I have no interest. And that's the problem with Rain's superlativeness: it flattens everything out, we have full view of what is coming.
If it doesn't tickle my brain, it's just boring.
Fjoslvinnr presents a false dichotomy: the world is not divided between Rain-like characters and angsty, conflicted, spineless heroes. There's a lot in the middle. Take Ryuuzaki Ikuo from Ouroboros, for example: he is insanely strong and incredibly sharp, and ruthless as ruthless can be, and his life is driven by a vendetta, but he can be outwitted by opponents, and is in genuine danger at certain times. He never hesitates to pull the trigger, and has no qualms afterwards, but what I like is that I don't know what is coming.
If you people like Rain because of his sheer, plain, predictable, unalloyed invincibility, fine by me, but saying that the alternative out there are necessarily agonising sops who regret their every move and always doubt their decisions is simply false. And frankly, aspiring at the kind of "ideal" Rain represents, devoid of weaknesses (and the humanity that is defined by these very weaknesses), is... well, odd, but maybe I am the odd one.
That must be why I hardly ever order vanilla. :-)
Not a huge fan of the purely intellectual OP. While their schemes can be engaging and interesting, I don't like suspending the disbelief that they can't simply be thwarted with a bullet to the brain. Sure, they might ward off some level of danger with leverage or other innovative ways to protect themselves, but far too many times, it just boils down to good fortune or the irrational unwillingness of opponents to pull the trigger when they have the chance.
And it's not like they don't fall into the agonizing trap. I mean, when Akiyama is accused of being no different from the other ruthless players or from the organization persiding over the games, he was laughably rattled by it. As if such a shallow observation would have escaped someone as smart as him and it took a third party pointing it out for him to "realize" his hypocrisy. And then of course, he has to be "comforted" by an even shallower observation by Nao.
Nor am I a fan of Ryuuzaki Ikuo and Danno Tatsuya because of their revenge "baggage". I'm not big into baggage, as you're aware by now. I don't like Rain's baggage either, but as you said, it's practically an afterthought so I can live with it.
Are those characters as preoccupied or paralyzed by their doubts and sabotaged by their traumas as most others? Of course not. I'm not saying they don't have redeemable qualities, especially in execution toward their goal.
But I'm the type that likes no fuss Westerns. Cowboy rides into town and whimsically shoots up everyone who deserves to be shot because he draws his gun faster than anybody. You almost never find out anything about his past because his past just doesn't matter. He's not hung up on anything. Personally, those with a little charm and personality are better than the silent stoic types, but the essentials are there in either case.
There just aren't enough of those in Japanese media. You say I present a false dichotomy, but let's be fair. There isn't really a lot in the middle. My end of the spectrum is even rarer. How many Rains are there? How many Ikuo's and Akiyama's are there? Between the type of characters I like and the characters you like, I don't think we make up 1% of the material out there. The other 99% belongs to the unbearably angsty category I railed against.
So when I direct my attacks, I'm directing them at the general "other". Obviously, there are degrees, and the closer they are to Rain in my book (and even closer to my ideal beyond him), the more I like the character.
You're welcome to think I'm odd. I also think it's odd when people enjoy reading characters riddled with human weaknesses.