I loved geometry, but I suppose it played right into my areas of strength. Compared to other maths, it was long on concepts and formal logic, and short on computations. My brain likes to hide the occasional stupid computational error at random locations, but could immediately visualize and grok the concepts of geometry, so it was basically made for the subject.

Geometry lays the conceptual framework that was used to build trig, but that doesn't mean you necessarily have to master that framework in order to use trig, any more than you need to master the concepts of metallurgy and the Carnot cycle to drive a car. You can just accept that it works, and use it.