I think my All Time Favorite anime ever would be Cowboy Bebop. It just had everything to me.
Characters I could fall in love with,
Amazing realistic-ish fight scenes,
Unique style of art,
Unique music
Really hit's the emotions hard. I laughed, damn near cried, and just really felt like I could feel what the characters were going through at times.
Faye was hot :P
Great Ending xD
From 0 to KICKASS in .stupid seconds.