I had a crush on a boy in jr high who was a sf fan and he recommended a book for me to read. I don't remember the name of the book but it had a character who had a little pet named Willis which was a little fuzzball with tripod legs--or I could have it all wrong, it was 40 yrs ago. After that one I read Asimov, Poul Anderson, Heinlein, others of the old guard. Then I watched TOS and was totally hooked. The only movies I care to see are sf. It's just more interesting and exciting to me than any other genre.