No matter what unit you choose, it's unreasonable for some purpose. For electrochemists, a coulomb is only $10^{-5}$ moles of singly-charged ions, not much. But for electrical machinery, coulombs/second (amperes) is a practical unit. The circuit breakers in your house trip at modest numbers of amperes.

These SI units are common in engineering, but there are other systems around. You might find [ESU][1] or [Gaussian][2] units more comfortable for electrostatics.


  [1]: https://en.wikipedia.org/wiki/Electrostatic_units
  [2]: https://en.wikipedia.org/wiki/Gaussian_units