I prefer to have sex in at least three positions. Makes for a convenient way to segue into oral sex and the like between bouts of intercourse.
I cum fastest in positions I can let loose in without restrictions on my thrusting. So your prone bones, your missionaries with her legs over my shoulders or her head, that sorta thing.
Of course, I can also choose not to jackhammer and instead pace myself even in those positions, but if I have a short period of time to cum, those are my go-tos.
As for taking the longest, cowgirl and other positions where there’s a restriction or limitation on my ability to thrust as I like or control the speed and intensity of intercourse.
Doggy: girl sits up on their knees and hands/elbows . They can use this position to control tightness upon entry by controlling how open their legs are and how arched their back is.
Prone bone: a sort of lazy version of doggy where the girl is laying flat (emphasis on laying completely flat) on her belly with penis entry from behind. This position often enables the female to work the muscles in the region resulting most likely in an over pleasurable time for the man involved, thus causing premature ejaculation.