I would say you are doing everything right. They look great. Don't mess with success. Like Sans2014 said about watering but in your area, no need to worry. In our cold wet winters, keeping them inside and watering them will cause them to rot.

Stush, so funny that you mention about the watering. Most of my nurseries on the island are on the east side. In Hawaii, the east side is always wet, I mean at least twice a week it will rain. When I go to these nurseries, most of the focus is tropicals (palms, gingers, heliconia). Therefore all the sansevierias they have gets soaked. All of the sansevierias that I have bought from there all have moss or fern growing out of them. But they are healthy as can be. Do you think the heat and humidity allows these sansevierias to not rot? When they come home to me, they adjust really well with less water.

You can grow Sans in any pot. Glazed pots and plastic don't capture and release moisture through the walls so they generally need less watering. I have ALL my Sans (about 25 of them) in plastic pots because I have many that grow via underground rhizomes which, in a strong plant, can actually break a plastic pot. I've had that happen twice--time to repot.

I live in SW Florida, so my plants are also outside all the time. Most of the time, it is downright hot here. Like you, I was about every 2 weeks -- more in the summer, less in winter, depending on climate. Your plants look FINE. As long as you have a fast draining mix, pots with drainage holes, and you don't let the Sans get cold, wet roots -- they should continue to be fine.

I had a friend in Australia who sent me a picture of reg. green Hahnii growing in a stream. Said they have always been there as long as he knows. It is hot year round there and the sans love it. I would not recommend this but in hot weather sans reacts differently.

Interesting?

Love the bright blueish color of your pot. It reminds me of the colorful flat paints they used on cars in the past. Nowadays everything just seems to be black, gray or silver ... Your pot matches very well with the Sansevierias, really an eye-catcher! Regarding your questions, I'm totally with everything others have said already.