I'm actually more comfortable with resin than styrene and abs models from working with regular props and garage kit minis for so long. Guess it's more about knowing the nature of the materials...
I know what you mean, except I'm the opposite--I much prefer styrene over resin (or vinyl, which I seriously dislike as a modeling medium) because I've been building styrene kits since the late 60s so it's the medium I'm most familiar with.
...Resin kits seem so much easier than injection molded hollow ones...
Resin, styrene, and vinyl each have their own pros and cons, you just have to learn what they are and how to deal with them.
...I'm really surprised that no normal kits of these were made when the show was super popular, it would have sold well.
People who build models as a hobby tend to think just about any subject would sell well in model kit form, but the companies that produce injection molded kits would probably say that's not a particularly realistic opinion. Car and military kit subjects have almost always sold well, but science fiction kits are very hit-and-miss unless the subject is extremely popular like the U.S.S. Enterprise from
Star Trek. And, unfortunately, it seems Baby Boomers (like me) are largely responsible for keeping the hobby alive these days. Each subsequent generation seems to show less interest in building models simply because there are a lot more ways to spend their free time now than there were 40 years ago.
That said, I'd love to see Moebius or Pegasus Hobbies produce a good Serenity kit, but that doesn't seem likely in the foreseeable future.
Returning to the main topic, I'm really interested in seeing your continued progress Sigma!