"I have to say I regretted giving up animated movies"

Stanislav Grof's quote suggests that he has experienced some remorse in quiting cartoon animations. This might indicate that he had a strong connection to cartoon animations in the past, and that he now is sorry for not having the ability to enjoy them as much as he used to. It might also recommend that he has recently given up seeing animated movies, and is now feeling regret for having done so. It might be that he misses out on the delight and entertainment that cartoon animations bring, or that he misses out on the fond memories connected with them. Whatever the factor, it is clear that Stanislav Grof has actually experienced some regret in quiting animated movies.