Heh. They're both SPs so at least they can probably find a lot of the same things fun...? Give or take some individual differences, of course. Conversations could go weird though. The ESFPs have a more elaborate conversation style. Might worry an ESFP after awhile if ISTP was mostly quiet. They dont need to know anyone's soul, just like to engage in conversation.. they talk about matter-of-fact/practical stuff just like all SPs.. but if ISTP was quiet a lot, it'd end. ESFP's need to engage and be engaged with people.. not indirectness.