Missionary is the position where I last the shortest amount of time before cumming, but it's also my wife's favorite position by far, so most of our sex starts and ends in missionary.
I selected missionary, cowgirl, oral and rear entry (doggy) in the poll as I love all those positions and would be happy to cum in any of them. My favorite position in cowgirl, with the woman leaning forward so I can kiss her, and also fondle and suck on her breasts and nipples.
For me an ideal sex session starts with oral, then intercourse in doggy, then cowgirl, and ending with missionary. Other than starting with oral, the order of the other positions can be swapped around in any order.
I've only experienced reverse cowgirl a small handful of times in many thousands of times of having sex. The women I've been with prefer to face me (as do I) and if I want to see her ass, doggy style is better suited for that. I just don't 'get' reverse cowgirl.