Well, I've never seen the anime, although I plan on trying to, but I love the 2nd Opening theme to Full Metal Alchemist, Ready Steady Go by L'Arc~en~Ciel. whee Love the music from Eva, X, Cowboy Bebop, and Hellsing.
Angelique: Lots and lots of character songs, all by well known voice actors. 3nodding My favourite is "Mugen no Yoru ni Kagi o Kakete".
Fushigi no Umi no Nadia/Secret of Blue Water: Opening and ending themes ("Blue Water" and "Yes, I Will"wink introduced me to the lovely voice of Miho Morikawa. Instrumental tracks are well orchestrated. "Koibito ga Iru Jikan" by Satomi Matsushita is adorable as well.
Highschool Kimengumi: Soundtrack provided by 80s Jpop group Onyanko Club (the predecessor to Morning Musume, a mega-group) subgroups, some of my favourites are "Ushiroyubi Sasaregumi", "Ushirogami Hikaretai", and "Anata wo Shiritai". 3nodding