[Wings of Fire]

Right

Okay

For a start, as Strike Witch mentioned, Tiger and Bunny is ridiculously cool and well worth your time watching it. I know it's your thing, but I didn't make the connection due to being a huge derp. I guarentee you'll thoroughly enjoy it.

Another one that slipped my mind is Heroman which is a series written by Stan fucking Lee in which an American loser kid finds a robot he uses to battle aliens. It's very overdosed with Marvel/DC style shenanigans and is pretty much Stan Lee's love letter to super robot shows of the 70's.

Two other shows by the same studio that might catch your interest are Star Driver and Eureka Seven. I'm sure Chris could enthuse you about how great Eureka Seven is more than I ever could, and Star Driver is a big electric fast paced meld of fabolousness and robots. Imagine TTGL if the manliness was replaced with camp.

Two shows I've recently watched that I think you might enjoy are Steins;Gate. which is about a self proclaimed MAD SCIENTIST college student who accidently configures his microwave into a time machine that can send text messages back into the past. It's very light hearted for the first half, then he suddenly realizes that shady organizations are after him to get the time machine and he may have time leaped his way into an unwinnable situation. Then there's Shiki which is a horror series about a family of vampires moving into an isolated Japanese village and fucking shit up. It's the anti-Twilight; gritty, visceral and the vampires represent everything vampire should be (Intelligent, monstrous, terrifying).

All these shows are 26 episodes/two seasons long, with the exception of Eureka Seven which ran for a whole year.

Lastly, I heartfeltly recommend The Girl Who Leapt Through Time which is a wonderful slice of life/low fantasy movie by the same director of Summer Wars and in my opinion his better movie. It's about a teenage girl who finds a funny little egg thing in the science room one day and then discovers she has the ability to travel backwards in time by literally jumping around. Everything has a price however, and she discovers that being outside the constrains of time leads her into some very awkward situations with her friends, and later on the movie turns more serious with a plot twist you'd never see coming. It's all about the joys of youth and friendship. Essentially the Japanese type cultural themes that aren't explored in Summer Wars.

And there's my recommendation list for you. No I haven't seen Golden Boy, but a quick look on wikipedia shows it's the kind of thing I think I might like and at six episodes it's not a huge time commitment. I'll put it on my list for sometime and watch it in a night.

EDIT: Also all these series have been licensed in the west and should be available to legally stream. Emphasis on should.