Yeah on the one hand you really want to see the end and see what happens (the final battle, Sasuke's fate, Naruto becoming Hokage?) but on the other hand when it ends people will be terribly disappointed because they won't have anything to watch from then on. So yea i'll be feeling pretty sad but I'm sure that other animes (like Bleach and One Piece, and even less popular ones like Fairy Tail) will keep us entertained, and also new animes will rise that will replace the BIG 3 (Naruto, Bleach, One Piece)