I have A question for Authors Out There

I find that there are stories that triger a story in me, at times, several. My Kelly's Journey was inspired by yyour basis tg love story, just as Terri's Vengeance is. But King Of the Rim is a combination of Star Wars and Star Trek. But my stories truly write themselves. I get the kernal of an idea from reading a story and taking the basic story idea and changing it to fit my idea. But I find that the story goes its own way after I start on it. Is it the same with you?