Do share, why don't you use them? And I'd rather have more specific reason than "I don't like them" (which is a valid reason ofcourse), because I'm curious why don't you like them.
Thank you!
EDIT: Typo, and thank you for feedback. :p
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Because a secondary should hit hard without you having to be within melee distance of something strong. Your not using a secondary on dregs or thralls (unless you use 1 in the abyss) so it's usually on a boss or yellow health bar enemy and shotguns put you too close without doing significant enough damage to warrant using one.