It was such a nostalgia rush, but also, that is such a weird quiz. I type in "S" and it immediately fills in an answer (which was not just the letter S, mind you), and guess wrong on another one but get a completely separate one right by random fluke. ^_^
0:12: I actually completely mistook this for a Studio Pierrot work at first, which is rather embarrassing...
0:19: Honey! Old theme songs were really nice in that they actually were made for the show, and thus tell you what show they are in the lyrics.
0:25: Candy Candy, right in the lyrics. See above. I'd literally never seen Cutey Honey or Candy Candy before.
0:48: Actually, of the big two back then, I preferred Maison Ikkoku to Kimagure Orange Road. It's also the only Rumiko Takahashi work I've ever actually seen, which is good, because from everything I've heard of Ranma or Inuyasha, it's also the only work Rumiko Takahashi actually finished properly instead of letting trail away. :3
2:47: I totally squee'd when Duvet started playing.
3:27: See above, only even more so with Scarlet; I love love love this song. That opening phrase is just so beautiful, and so distinctive. Scarlet is one of my favourites, like Pure Snow, but unlike Himiko-den, I've actually seen Ayashi no Ceres. ^_^
3:45: This one was the one that I mistook for another one, but I would have gotten it anyways. The characters are really iconic, and the song was by Do As Infinity.
6:56: This tricked me out for a moment, but the answer was simple - is the song by Fujiwara Miho or Lia? Actually, it was even simpler than that - the quiz didn't care about which adaption. Good thing, because I never actually saw any Key anime made after Air, which includes the Kanon remake.
7:02: This was a little tricky; I never actually watched the anime, but I followed the manga religiously until Ai Yazawa ended up in the hospital for almost a year and it was put on hiatus. I got it only because of the cell phone image of Nana.
7:07: I suppose "Kiss kiss fall in love!" would have been too obvious from the lyrics, and simultaneously not obvious enough from the visuals at that point.
7:14: I was a little bemused that I couldn't find a permutation of Demashita! Powerpuff Girls that it would accept. Not too much, though; that Z is apparently important. ^_^
9:05: I type in "S" and it fills in this answer. I've never even heard of this show before, so I'd not have gotten it on my own..
9:47: Like a banana or the Mississippi, I know how to start spelling Durarara, but I have no idea how to stop.
9:53: They made a second K-ON...I recognized their particular band of aggressively-otaku-marketed distillate of moe, but didn't know the name of the second season.
So many shows I identified just because of the bands, like Inuyasha (Do as Infinity), almost anything Key (Lia), Furuba (Okazaki Ritsuko, may she rest in peace), and others because their characters are so iconic, for better or for worse (The Shounen Three, One Piece, Gundam, Dragonball, Digimon, Pokemon, Astro Boy, Berserk, Evangelion, Conan, Lucky Star, Ranma, both FMAs...). Still others I identified because their art styles are so unique (though I did almost mistake Elfen Lied for Gankutsuou at first). It says something about pop cultural osmosis that, having never seen almost all of the above (except Gankutsuou, Gundam W, and Gundam Seed), they could still be readily identified in heartbeats. That said, I did not get Gundam 00 (since I stopped cold after Destiny and the first couple episodes of 00 had me doing the metaphorical equivalent of putting my head through my desk), Code Geass, Gurren Lagann, Kenshin, or a bunch more, so...
And now I have Duvet, Scarlet, and Flower all fighting for top earworm in my head. I suppose I should just be glad that HAL (Angelic Layer ED) and Gumi (Card Captor Sakura ED) weren't in there, but Flower wasn't, either...
Final score, ignoring that weird answer glitch (since I never would have gotten it otherwise): 62/101. So much red in the third column...