The first time I watched the ending, it annoyed the hell out of me. I was like 'Wait, that's it?'. But then I watched it again. One way to look at it is that the whole series is a prologue to episode 1, sort of like Batman Begins.
But then, I have another way of looking at it. I like to call this way, 'Where the hell is season 2!?'. It's been rumoured for a while, but I guess it's just one of those internet rumours that comes and goes and nothing comes of it. (Sort of like the live-action Evangelion movie, a-heh.)
I still rank Berserk as one of my top anime, even though I haven't watched it in a while. It's faithful to the books (mostly), even going so far as to do a scene shot-for-shot following the frames of the comic. The music is awesome, the dub is actually pretty decent, and the drawing is pretty clean. The only thing I have a fault with is that there isn't any more of it. Ah, well. There's always the books. If you haven't read them, I recommend them.