For my head canon only TOS and the first 6 movies are canon, sometimes I think like that. I also think it must have been nice in some ways between 1966 and 1987 when TOS was all there was. I always really liked the Romulans as a villain, thought they were superb. Did not like in the new Trek how Romulus was destroyed. So using head canon I can ensure it still exists! Also hated the fact Kirk died in Generations, so like to use head canon to totally ignore that movie.