Consumer segmentation is a delicate process requiring a steady hand and a sturdy heart.
Sure, it might be tempting to micro-manage by creating mini segments to maximize margins. But significant overlaps usually result in under-impressing and end up being a mega mistake. In the end you might go beyond market cannibalization and you end up eating your own young.
Don't think too big, don't think too small, for in the end you please nobody at all.
(Thanks to those Facebook acquaintances who shared this video.)