Two of my favorites, without a doubt... Dragon Ball Z (the American version) and Naruto, (both the *Cartoon Network* American version, and the Japanese version.) It's a bit difficult to watch for some since it's far too flashy, but... the commercial for the character "Trunks" in Dragon Ball Z, started it all for me. ("Trunks Promo" on YouTube.) The Music, and how they portrayed Trunks, had me watching that commercial over and over again... when I found it on a DBZ VHS tape.
![Tears of joy :'-)](/Smileys/default/crazy.gif)
Capital "M" for the Music in that commercial... it was after that commercial that Dragon Ball Z became my first favorite Anime at the time.
Mainly because of the fighting scenes, more so than the story lines.
Other major Anime shows became favorites of mine as well when I was a kid... like Outlaw Star, (American version) Tenchi Muyo, and Gundam Wing.
Those shows, as well as Naruto and DBZ, aired on Toonami, through Cartoon Network.