While BW didn't have the very best plot in RPG history by any means, I personally feel that it was enjoyable for what it was worth and the characters were sorta likable and not just mere plot devices (though they still need some work). Honestly, I don't mind the " kid saves the world" plot if each take on it show variation and offers something new to the table. Pokemon does just that, though I feel like BW could've been so much more.
Besides, we might get an improved plot in Pokemon Gray if it's hopefully released. I mean, you know how the third version is usually an improvement over the first two versions.
Of course, I can like smaller plots but I like a grand plot when it's good.