I've come to a theory that kids gravitated to one theme or the other with RAH. You preferred the water, the snow, the air, or the ground themes as a kid. Because I grew up in Southern California with very few trips to the snow and mountains; more tips to the seashore/Catalina island/ocean fishing and a swimming pool that my Grandparents had, I've always preferred water themed characters and vehicles. So I'm more on board with any water themed stuff.
I love the Air vehicles but because they take up so much room, they'll have to be small for me to buy. I think the only large air vehicle I'd be tempted by is the Rattler. A Classified scale Weather Dominator or Mass Device is interesting. It would be a good idea to make Cartoon version of characters to go along with them to make the purchase more enticing. If they weren't that expensive, I'd buy.
I hope they make the orange Joes & red Cobras scuba versions with a couple of switch out character heads included for mass retail. I'll buy multiples!
A sub preference would be preferring the green Army men with a more realistic military aesthetic, the mix of bright over the top & military characters at the height of RAH popularity or, the neon and ninja crap at the end.