From my ex girlfriends / fuck buddies experiences, lol there is no preference. You literally just end up in whatever position either of you fancy/request.
Typically though, in order:
missionary (oh how boring!) yet women love it when they are knackered!
doggy or girl on top seems to be equal among women's preference in my experiences.
Spooning
Girl on her back with her ankles over his shoulders
...they usually seem to be the next favourites.
Any other positions tends to be used by young adults, mainly as a "been there done that position" thing?
Other than that, missionary, doggy, girl on top, girl on back her ankles over his shoulders seem to be the "go to" auto positions. Spooning if you're getting on a bit.
Don't forget the old wives tail: if you want a girl then go missionary, if you want a boy do it from behind if she's laying down.
I must confess, speaking as a male, we need more women. What male wouldn't want multiple wives lol