Chess would be a strange game if 1...e5 were a bad reply to 1.e4, in my opinion.
It's perfectly good, it's the classical reply, it's the recommended reply for beginners, and a drawing weapon at ultimate top level. It should be the first defence to 1.e4 to learn.
But yes, you'd probably do better if you played to equalize first (not the same as playing for a draw!!) and from the moment you have an equal position, try to go for a win.
I know the Ruy Lopez is a respected opening as white, but is it acceptable for black to just walk into it? I was looking at the game explorer, and according to the statistics black wins less than one quarter of the time. I chose the Ruy Lopez as my defense against the king's pawn a few months ago, and I'm starting to second-guess that decision.
I chose it originally for a few reasons: it's interesting, it's positional, it's not crazy wacko like the Sicilian, it's not very symmetrical like some other annoying openings... but at the end of the day, is it a bad move on black's behalf?
I get slaughtered with it all the time (except for the exchange variation, which I've had great success with), but I enjoy playing it (god knows why, ha ha) so I've stuck with it. I've recently come to think that perhaps the reason I'm not faring well with it is because I'm always trying to WIN, when I should be playing just for a draw.
What do you guys think about playing the Ruy Lopez as black? Do you have any advice?