Ci-ne-ma is probably my favorite ending to Maison Ikkoku, too, Path!
More faves:
Hana Yori Dango OP:
http://www.youtube.com/watch?v=5-E1to_OUmE
I'm so sad this series is oop...I kept waiting for Viz to release a box set of it and they never did. Now some of the single DVDs are impossible to find or super expensive. ;__; The OP is really fun and catchy.
Flame of Rekka OP:
http://www.youtube.com/watch?v=SidNYxJakRs
Again, another series I was waiting for Viz to release a box set for and it never happened...:/ I had fansub tapes of this back in the day, it was kind of like Yu Yu Hakusho but with Ninjas, iirc.
Yu Yu Hakusho OP:
http://www.youtube.com/watch?v=IDDrisl1fzM
Speaking of which...XD (I still will sing along with this song whenever I hear it, lol)
1st Kenshin OP:
http://www.youtube.com/watch?v=j_WReTDhO8Y
Well, really, most of the Kenshin OPs were pretty awesome. I also liked the second one a lot, too:
http://www.youtube.com/watch?v=X6vnMqBMtmw
Gunbuster OP:
http://www.youtube.com/watch?v=xO_2isD-yu8
I love Noriko Sakai ;3; I think this was the first song I ever heard by her, actually!
Nadia OP:
http://www.youtube.com/watch?v=51TROMvrlh8
"Don't forget to try in mind" is some of my favorite Engrish, lol. XD
Koko wa Greenwood End:
http://www.youtube.com/watch?v=nX7gcKkfDjk
I remember several fansubbers going by "No Brand Heroes" or "No Brand [whatever]" after this came out, lol.
Video Girl Ai OP:
http://www.youtube.com/watch?v=1bM5Uo27PxE
Again, Noriko Sakai <3 (The ending theme is good, too, though a lot more somber)