Did anyone dislike her?

I was about to mention Harris, but you got to him before me. Reportedly the feeling was mutual, but Julie herself never went on the record about him. As for anyone else, no I can't say so... I think it's telling that her big three romantic leads (van Dyke, Plummer, and Garner) each collaborated with her again, long after their first onscreen endeavors together.

Nobody is liked by everybody,regardless of their reputation,

If you go to the Barbra Eden board,for example,it will be a forgone conclusion that there can't possibly be anything unlikable about her. Yet, people who claim such have never as much had a cup of coffee with these celebs,much less known them.

All we know is the image they present on-screen,what they give to charity,and their behavior in interviews. That's all we know.

Yes, of course, you're right about that, but for example, take Christopher Plummer, the kids were afraid of him while filming The sound of music, and even himself has acknowledged he was a douche when younger. There are fans who claim they've met their favourite celebrities and they were nothing but nice, or completely the opposite.
I've always been interested in knowing what other celebrities think about an actor or actress I like. I know Robert Goulet was in love with her, and Richard Burton had a crush on her, but do you know about somebody else? maybe modern actors who have grown up watching her movies, like Anne Hathaway.

It's not good business for actors to speak ill of other actors in the press,though some do.

Harris is the only person in her nearly 60 year career who expressed this antipathy towards her, and we all know about his many issues resulting from excessive drinking. He was angry at the producers of HAWAII because, by the time he started filming, they had already been shooting for a long time and were seriously behind schedule, so they reduced the size of his role and eliminated an important sub-plot in which his character was involved in order to complete the picture and reduce the overages. He was paid his full salary but, nevertheless, caused a lot of disruption on and off-set and, for some reason, blamed Julie for not taking his side in lobbying to restore the full scope of his role. He really hated her, with no good reason.

Tellingly, she and her other co-star in the film, Max Von Sydow, absolutely adored each other and would work together again some twenty years later in DUET FOR ONE. Robert Goulet remained close with her until his death, and appeared on her Emmy-winning television variety series. He was also featured in the 2001 tribute to her when she was inducted into the Kennedy Center Honorees. Richard Burton insisted that she was, apart from his then-wife Elizabeth Taylor, his favorite co-star. Burton was the one who affectionately described her as being "as wicked as a street Arab, a nun with a switch-blade."

One interesting side-note is how many of her male co-stars of stage, screen and television share the same birthday with her: Stanley Holloway, Everett Sloane, Walter Matthau, Stephen Collins and--yes--irony of ironies--Richard Harris!

Thank you, thank you--you're most kind. In fact you're every kind.

I can't believe that man made me love him so much as Dumbledore ! haha it seems that she is really loved by anyone who has met her. Are there any famous people who have said she was one of their favourite actress /singer or an inspiration to them? I know Anne Hathaway has said she was really nervous to work with her in Princess Diaries, and I know Chris Colfer is fighting to get her to play his grandma on Glee ...Do you know of any others ?

Yes: both Cherry Jones (who once said she knew she was a lesbian at an early age because she kept counting the freckles on Julie's face in the photo on the back of the original soundtrack album of THE SOUND OF MUSIC) and Annette Bening have said she was their greatest early inspiration and idol. Also, Kristen Chenoweth was so inspired by her that, when Julie received the Kennedy Center Honors award in 2001 (?), she ASKED that she be allowed to participate in the tribute. I'm sure they are plenty of others.

Thank you, thank you--you're most kind. In fact you're every kind.

Thank you Millie ! you seem to be a big fan of Julie ! All my friends don't even know who she is, they say "oh, that woman" when I tell them .."She's Mary Poppins" ....so it's nice to meet another fan