A common trait between us human is, we have emotions. Decisions we make – we like to think it’s based on rational and logic but infact it’s derived from intangibles like feelings and emotions. It’s not a bad trait and certainly shouldn’t be considered as an appendix from our ancestors. On the contrary more advanced creatures are more emotional than primitives, human being the most emotional of all helping us make decisions fast.
However, when building products for our users we often forget this behavioral aspect.