100% agreed! To that end I name these anime titles as pools of awesome:
Cowboy Bebop intro - goes without saying
Fullmetal Alchemist - ALL intros and outros, esp the one with Winry singing with the dog
Outlaw Star - Intro is space-shooting fun and both outros kick serious ass
Trigun Intro
Azumanga Daioh - tell me your head doesn't nod
Dragonball Z - guilty pleasures
Naruto - "We are fighting dreamers"
Bleach outro "Thank You" - Beautiful