Did you just have your mind blown away by a new anime intro (or outro) sequence? Was the music so freakin' cool that you just gotta tell someone? Does your favorite anime happen to the have the greatest intro (or outro) of all time? Does a particular anime intro sequence mesh so well with the music that it merits mention? Anime intros (and outros) instill a myriad of emotions in me and are one of my favorite parts of anime.
No matter where you go, there you are.