I am a professional algebraic geometer. I write research papers, talk about interesting geometry questions with other researchers and students, and learn as much as I can. In the meantime I teach college and some high school, or even elementary school students about algebra, geometry, calculus, real and complex analysis, differential equations, logic and proof, algebraic and differential topology, cohomology and sheaves, algebraic varieties, complex manifolds, abelian varieties and theta functions. A big gap in my knowledge is lie groups and their lie algebras, as well as Fourier analysis and group representations. Partial differential equations is another gap, but I have made a lot of use of the heat equation and Laplace's equation in geometry.
My career in this subject has led me on enjoyable invited visits to France, Italy, Germany, Spain, Mexico, Chile, Canada, and Japan, most of which I had never been to before. Geometry has enriched my life. My favorite special occasion wine is Isosceles, from Justin, Paso Robles. I admit a different profession would have provided more income for such pleasures, but geometry itself is a great pleasure. I also get a lot of pleasure from reading and responding to questions and replies posted here.