Interesting question. I notice that I tend to optimize my daily experiences and then minimize deviation from those experiences, so that when I find my favorite dish in a restaurant, I rarely order anything else. For example, I get Sunday dinner at a Vietnamese restaurant where I've gone for 16 years or so. I'm in there at 4:30 almost every Sunday. I always get Pho Ga. The time works for me because that's when I get back from the lakehouse and I get back at 4:30 to beat traffic, yet extend my stay. The soup works for me because it's delicious and doesn't upset my stomach.
It's not that I exclude new experiences, exactly, but I route myself into habits that I know suit my tastes a lot. Age may be a factor. When I was in my 20s, I experimented a lot more, but now I know I like Vietnamese food better than Chinese or Thai food. I know that I prefer a weekend alone in my cabin to a party. I prefer sobriety to intoxication. Rock climbing is more fun than caving and simple hiking is more fun than either. At 55, I know what I like and how much I like it. Experimentation becomes less important than experience.