Oh MAN, you should not ask this sort of question around me
OPENINGS:
"You Can Be My Baby" by The Red Squares (A good, punchy kick off to any sort of action oriented series)
"Paper Sun" by Traffic (A lively, early-psychedelic tune that would be a good fit for a light-hearted romantic comedy)
"Aa seishun" by GO!GO!7188 (A surf-meets-mod throwback to the earliest days of Japanese rock, well suited to an action series)
"I Can't Let Go" by The Hollies (Propulsive beat, punchy performance, determined lyrics; a perfect opening to some underdog story sports show)
"21st Century Schizoid Man" by King Crimson (PERFECT for a dark, "We Have Seen The Future And It Sucks" sci-fi drama)
"Requiem for O.M.M. 2" by of Montreal (Just about any anime intended to provoke smiles in the viewer would benefit from following this indie-pop ditty)
"Misirlou" by Dick Dale (A.K.A. the
Pulp Fiction song. MADE for a gritty action drama)
"N.I.B." by Black Sabbath (Some gothic vampire would do well with this riff-tastic tale of questionable love)
ENDINGS:
"Gone Is The Sad Man" by Timebox (A dreamy, Beatle-ish bit of brit-pop that'd be good for one of those contemplative montages of one of the female characters walking around outside)
"It's A Sin To Go Away" by We All Together (A bittersweet, organ driven ballad that'd be a good wrap up for an oh-so-romantic shojo tale)
"The Actor's Opprobrium" by of Montreal (A silly harem anime could have a good, up tempo ending with this high energy tune)
"If" by Triceratops (Another song that'd be good for a slow montage, this time set to alterna-tinged Jrock balladry)
"Catch The Wind" by Donovan (any sort of serious show that wants to end with a bittersweet series of photos of the character's long-lost past need look no further than this acoustic folk song)
I've got a BILLION more of 'em!!!