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I'm curious about this, because I did play PS1 for a while, and I've been playing FPS games since they were invented. When I jumped in to play this game, it only took me a few hours to realize it's all a bit too simple. I fully admit that I didn't play a lot of it, but I'm still trying to get my head around what the longer-term draw is.
You essentially run around, capture bases, sometimes with a battle, then rinse and repeat. I had this same feeling with Guild Wars 2 WvW too, where we just ran around and captured bases with no real meaning. After you do this for several hours, it may occur to you that there are much more interesting things to do with your time.
Am I missing something? What keeps you coming back to PS2, and what will keep you for the long term? Capturing bases over and over and over again isn't enough for me.
A sure sign that you are in an old, dying paradigm/mindset, is when you are scared of new ideas and new technology. Don't feel bad. The world is moving on without you, and you are welcome to yell "Get Off My Lawn!" all you want while it happens. You cannot, however, stop an idea whose time has come.