Okay, let's get to it!
This category has a lot of competition. Fortunately for the continued diversity of my list, Naruto does NOT make the cut. At all. In fact, Naruto and Naruto Shippuden must hold some kind of record in that they have more openings than I have *ever* seen for one anime, and virtually *ALL* of them Suck. There's one that sorta catchy (but still sucks in its own way) and one that's tolerable, and after that, it's just suck, suck, and more suck.
But for GOOD openings...
Well, there's the opening for Giant Robo which includes both music and narration. That kicks ass.
The original OP for Samurai Troopers, "Eyes", is also excellent. I am also convinced that one of the Pet Shop Boys heard it early on because the similarities between "Eyes" and "It's A Sin" are too great for me to dismiss as coincidence. (I don't deny it COULD be coincidence but I'd have to hear some testimony on that from one of the band members who wrote it)
Dragonball Z has two kickass openings, the original Cha-La, Head Cha-La and the later We Gotta Powaa (none of the hideously bad American music need even try to get in the door, it can just put itself in the dumpster).
Nadia: Secret of Blue Water's opening is as open and full of wonder as the anime.
As with every other part of it, Escaflowne's OP is nigh-perfect.
No single franchise has managed to keep the quality of the OP's as high as Slayers; I haven't seen the latest, but the first three series had awesome OPs: The Slayers' "Get Along", Slayers Next with "Give a Reason", and Slayers Try handing us "Breeze".
The wonderful Ah! Megamisama! opening captures the spirit and sparkle of the series.
Despite the fact that I don't particularly like the series, Tangerine Dream's OP theme for Tenchi Muyo! is one of my favorite pieces of music.
And speaking of things I hate which still have good OPs, that would be the definition of Evangelion's OP, which provides an excellent opening that's completely out of place in the suck.
No listing of Awesome OPs, however, would be complete without mentioning TATAKAE! OTAKING! from Otaku No Video. I sometimes think of this as my life's theme song.
I could go on doing this for hours, I think. Yet in the end, "There Can Be Only One!", and that one must be:
My first real anime, the opening blew me away originally and it still does. It **IS** anime to me, those chords bring out everything that I found in this hobby and crystallize it into a single cry of AWESOME.
Day 1 - Very first anime:Saint Seiya
Day 2 - Favourite TV series: : The Vision of Escaflowne
Day 3 - Your anime crush: Belldandy, from Ah! Megamisama/Ah/Oh My Goddess! and Shun from Saint Seiya
Day 4 - Favourite Film: Tonari no Totoro/ My Neighbor Totoro
Day 5 - Anime character you feel you are most like (or wish you were): Shikamaru from Naruto Shippuden
Day 6 - Most annoying anime character: Mihoshi, Tenchi Muyo!
Day 7 - Character you’d most like to slap: Sasuke, Naruto Shippuden
Day 8 - Most epic scene ever: End battle of YuuYuu Hakusho: The Poltergeist Report Movie
Day 9 - Saddest anime scene: Belldandy erasing herself from Keiichi's life in Ah! Megamisama/Ah/Oh My Goddess!
Day 10 - Favorite slice of life anime: Koko wa Greenwood
Day 11 - Favorite mech series: Giant Robo: The Day The Earth Stood Still
Day 12 - Best instalment of a franchise you don’t like: Nihao My Concubine
Day 13 - Worst instalment of a franchise you do like. Dragonball GT
Day 14 - Current (or most recent) anime wallpaper: Picture of Son Goku with Shen-Long done by my wife Kathleen
Day 15 - A reality check for a genre you like : Power-warrior anime and internal sanity/consistency!
Day 16 - An anime classic that simply doesn’t work for you: Neon Genesis Evanjellydonut... er, Televangelist...er, Evangelion
Day 17 - Best Background Music: Giant Robo: The Day The Earth Stood Still
Day 18 - Best Five-team: Yoroiden Samurai Troopers/Ronin Warriors (no link, too expensive)
Day 19 - Change you’d like to make to any one anime: Specific Change: Eliminate one nasty action from the history of Juraia-sama in Naruto/Naruto Shippuden. General Change: Eliminate the Saiyajin focus and expand capabilities and screen time for all major characters in Dragonball Z.
Day 20 - Most ambiguous anime character: Selected Maraich and Patalliro, from Patalliro!
Day 21 – Favourite OAV Series : Except for two I've already mentioned, Bastard!!
Day 22 - Animation studio you'd most like to slap: Gainax, for Neon Genesis Evangelion
Day 23 - Anime you think had the best, or most intriguing art: The Five Star Stories
Day 24 - Favorite anime hero or heroine: Uzumaki Naruto from Naruto Shippuden
Day 25 - Best anime villain: Orochimaru, Naruto Shippuden
Day 26 - Your favorite harem anime: Ah! Megamisama/Ah/Oh My Goddess!
Day 27 - Favorite anime opening theme song: Pegasus Fantasy, Saint Seiya
Day 28 - Favorite anime companion/summoned creature
Day 29 - Best Anime Music Video
Day 30 - Favorite anime ending theme