For me, it was a huge love for fantasy and sci-fi stories since childhood, be it books, film, TV or animation... I loved escaping into different worlds. (I also wanted to be an astronaut for many years as a child, so my love of the unknown goes back a LONG way.) Over time, my own fantasy universe began to coalesce, with its own lore, species, magic system, characters and so-on. I always knew I had to tell share that world and its stories somehow, at some point in my life.
I thought it would take the form of illustrated novellas because I didn't think I had the artistic chops for a graphic novel. Buuuut, now here I am with a webcomic!
As for more direct inspiration for Blue Star in particular (since it's technically a side-story for Dragonfeathers, which is its MUCH, much larger parent project) shows like Cowboy Bebop, Firefly and Star Trek Next Gen all played a part in inspiring me.