I use 0.1" (2,54mm) pads (with headers) for all my prototypes. I don't like to use connectors when first developing a product or proof-of-concept: I cannot easi

I use 0.1" (2,54mm) pads (with headers) for all my prototypes. I don't like to use connectors when first developing a product or proof-of-concept: I cannot easily connect a scope/multimeter to a JST connector or its exposed pins. In electronics, there is nothing better than a good piece of wire soldered between two boards. Connectors are a convenience feature.