What is your favorite anime of all time? If you can't think of just 1. Best 3, then?

I was about to stick with three titles, but I changed my mind and might relegate it to two rock-solid ones, and two titles for a would-be third for the moment. The two rock-solid titles I'm referring to is Cromartie High School and Great Teacher Onizuka, while the third one would have been Trigun, but I haven't saw it in such a long time that I'd need a re-watch to not rely on nostalgia. The third place would be a tie between Gunbuster and Nekomonogatari White, but I saw both of these just last year, so think I need more time to pass to confidently place these two on the list (even if both of these are the strongest candidates for me right now).