Copy/paste from other site with little changes to the descriptions:
1. Macross, all the series.
2. Mobile Suit Gundam, practically created mecha anime as we know.
3. The Vision of Escaflowne, reached almost perfection at every single level.
4. Sousei no Aquarion, hippy fun for everyone.
5. Eureka seveN, greatest ikano circus on digital format.
6. Saint Seiya, I got to choose a shonen title, didn't I?
7. Last Exile, after watching it for the 7th time it wouldn't be fair to not put it here.
8. Neon Genesis Evangelion, greatest bleeding mecha.
9. Fullmetal Alchemist, best combination of humor and drama ever.
10. Gungrave/Trigun, Trigun manga is better but I gotta love Nightow's work.
Yeah, I cheated on the last one.