Royal Dragon (The Bride Hunt Book 1) Kindle Edition by Charlene Hartnady (Author)
Is it this series? It's the first one I thought of when I read your post -- I don't remember air bubbles but I know the women were chased by the aliens. I liked book one (I linked it) but haven't read the later books yet.
>>> I’m looking for a book that was about aliens mating with human women who were selected into different planet types, water, air etc.
The scene I remember is the women were in the air in plastic bubbles and the bottoms dropped out and they fell towards Earth and the alien men had to fly up from the ground and grab them. There was a fight in the air where one tried to grab a girl from someone else.
I remember the hero(es) being really nice. In the same book or series, the water aliens had to swim through maze to get to the earth girls. It has been driving me crazy trying to remember the author. How could I forget with such wild plots??