For me personally, I used to have those rushes at the very beginning as well. I guess it was because of a lot of hard work finally paying off. And of course the feeling of something completely new, that you have heard so much about. But after I got more and more, I started getting less and less initial rush. Now I just realise I am dreaming and get a smile on my face.
However, I still often feel like my emotions are multiplied in a LD. The initial rush is gone, but that doesn't make the dream less good for me. Actually I am quite happy it settled down a bit more. It used to wake me up faster
If you really liked that feeling the don't worry. There is still plenty of comepletely awesome stuff to do that will give you a rush. You are just starting to get to the fun stuff