Geology. I am a seasoned mineral, gemstone, element, and fossil collector who has been in the hobby for almost 13 years. I love the crystal shapes, colors, sizes, and the fact that just like people, not one two stones are a the same. My favorite mineral/gemstone is blue topaz. Favorite element is iridium. And my favorite fossil is Isotelus maximus, or the trilobite. I collect them for fun, education, and as an investment should I choose to make a portfolio one day.
I also like chemistry and STEM. However, there's some conflict with STEM. I failed algebra 3 times in college and retook it once in high school , and my high school robotics team bullied me. Higher level math isn't my strong set.