Tops:
1. [B]Rurouni Kenshin Series / Samurai X OVA's[/B] - Do I even need to explain? Well written, great action sequences, a love story that evolves over time (especially through the OVA's), and a nostalgic precursor to current action animes.
2. [B]Neon Genesis Evangelion[/B] - Once again, for obvious reasons. Back before anime was anime, you had titles like this. Brilliant story that could keep you thinking for days, gripping action, and once again, it set the tone for the animes of today. In-depth characters who you could watch evolve as the story pressed on.
3. [B]Kumo no Mukou, Yakusoku no Basho[/B] - I honestly couldn't find anything bad about this anime. This is slowly winning my heart in the best anime category. Every time I watch this movie, I learn a little more about a character or I pick up on something I missed before. In my eyes, those are the best types of anime: ones you can enjoy every time and learn from every time.