By the ton of responses to your question you can see that everyone has a quick and easy solution to your question. Unfortunately, I don't think there is a simple answer to your question. Many players will say don't memorize openings, just as you have done, memorize a short number of moves be intuitive and play for enjoyment. Some openings allow you to do just that. Others are less intuitive and the best moves were found by better players using trial and error, for instance, some lines in the Sicilian are very anti-intuitive and to get any enjoyment out of playing you must know the opening.
I guess the real question is what do you want out of your chess game? Fun, without a great deal of knowledge of what is happening in the game. Fun, with the idea of appreciation, something like enjoying the fine arts by knowing something about it. Or Fun, because you win more times than you lose. Or some mixture of the above. In a sense, it comes down to how much time you are willing to spend and what are your expectations. Study as much as you like or as much as you are willing for the results that you want.
Let me preface this with a disclaimer. I'm new at asking for other people's opinions and new at chess too. I play for fun, and I completed the lessons in my Chessmaster 9000 a few years ago, but I've never competed in anything or been coached. So here goes.
My chess.com greeter said it was permissible to use the game explorer as a resource during online chess games, and I've been doing that. A lot the moves I get from it would not have come to me naturally, and my understanding of them is not so deep. In one game I was playing white and the opening was something called an "old Sicilian." I don't usually open with e4 precisely because I'm afraid to play against the Sicilian, but with the game explorer to help me into the middle game, my courage was bolstered. After about 10 moves I started to get really sick of the book, so I did something silly and traded away my d4 Knight. Then the beauty and resilience of the defense really struck me, and the clouds parted and a light from heaven shone on the d6 and e6 pawns (and the bishops were somewhat illuminated as well).
My old way of playing the opening was to memorize 3 or 4 moves and then just try to play something that would require a less-than-automatic response from my opponent (brain engaged? mission accomplished!), but the complexity and tension of these positions that I'm arriving at is, like, bottling my mind, and I would really like to have the strategic sense that could derive them.
So for all you better players than me out there, is there a way of studying the opening from a strategic point-of-view? I would much rather work on tactics than memorize lines, and isn't the opening just a way to improve your tactical chances later on anyway? I mean, I know the 'rules' about how to develop, but the idea of playing a "dark square game" (for example) is a little too abstract for me to appreciate until it happens and somebody's well-placed and well-supported knight in the center or whatever gives me a headache.
Anyway, any advice you guys have would be appreciated. I know from my own profession that nobody gets very far without being taught...