There is definitely nothing wrong with you. There’s a reason the phrase “childlike wonder” exists. It’s normal for the newness and novelty of everything to amaze a child, and it’s normal for experiences to become routine to adults. Even if you do experience something new, there’s a very good chance that it’s similar enough to something you’ve experienced before. Brains are designed to find patterns and relate things back to past experiences as part of a survival instinct.
But there is also nothing wrong with people who don’t have the experience I described above. The above experience is probably more common for people with neurotypical brains. I’ve never been able to relate to “not feeling” or “feeling less”, even though it seems to be quite common. My feelings are always a live wire, dialed up to 100 (and honestly, I’m over people - including doctors - telling me how nice that must be). But there’s nothing “wrong” with my brain. It just functions differently, with different strengths and weaknesses. It’s like comparing a car and a motorbike. They have different driving sensations, require different skill sets and safety precautions, but they’re both vehicles that will get you from A to B.