Well, when I get a good idea for a Star Trekky original species, I can go for it. The complicating factor is that I'm restricted from just one-shot my species as easily as the actual Star Trek writers could - I need to go back to them, so I always need to have a fuller concept of what to do, and I usually have only a day or so to come up with it. Now, I've had a lot of suggestions for different species, but I don't always feel the "Trek" vibe in all of them, the whacky utopian vision with big bads and rubber foreheads and limited budgets, where the Preservers humanoided left right and centre, so that doesn't always help.
Sometimes I hit the mark I want, sometimes, ehhhhh.