Blade Runner. Fell asleep through it when I was 8 or 9, tried again as a teenager found it boring, watched it again recently and thought it was great! Watched it about 3 times in a few months. I do feel its one of those movies you need to watch more than once to really appreciate.
Also St Elmos Fire. Saw it around 8-9 i liked breakfast club so i thought id like it but found it boring. Then loved it when i rewatched as a teen.
It's A Wonderful Life. Always thought it was slow, and being in black and white made me associate it with the "dull" movies my grandmother would always watch on TCM.
Maybe not what you are looking for but I hated Anchorman. Watched it a couple years later and loved it. The first time I saw it I thought it was just way too obnoxious. When I rewatched it I realized that’s kind of the point.
When I was very young, I hated when my father wanted to watch Empire Strikes Back with me. I thought the movie was long, slow and just really boring. I also didn't enjoy watching Han get tortured and I really hated Lando. I loved Eps 4 and 6 so much more at the time. My father would laugh it off and told me I'd appreciate it when I got older. He was correct.
Nowadays, I think it's a terrific movie.
Blade Runner. I was in my teens when I first saw it. And all I knew it as was a science fiction classic starring Harrison Ford. So obviously, I was expecting something more like a gritty Star Wars lol. Not a noir film. So I hated it when I first saw it. It wasn't until I got more well versed in classic films and film in general did I love Blade Runner.
We rented A Fish Called Wanda back when I was like 8 and it's still on my mind how disappointing it was. As an older fellow, I really loved the movie.
[La Dolce Vita](http://www.imdb.com/title/tt0053779/) was much better at 30 than it was at 20.
**Ghost World.** I didn’t get all the subtle nuances back then. Today, the movie is hilarious on many levels.
Turned off The Prestige after about 15 minutes when I was 13 or 14. Watched it a few years later and loved it.
The Truman Show. He didn't talk out of his butt once! Fuck you, Blockbuster!
2001: A Space Odyssey bored me to tears when I was a kid and now I simply adore the film.
INDIANA JONES AND THE TEMPLE OF DOOM. I just loved RAIDERS OF THE LOST ARK so much and could not wait for the sequel. I remember seeing TEMPLE OF DOOM at the theater (I was 15) and just being confused and thinking "No, this is not the Indiana Jones I wanted." But, over subsequent viewings and years of wisdom, it's become my 2nd favorite Indiana Jones movie (next to Raiders). So good. Plus, it's a prequel!
I used to absolutely despise *Finding Nemo* when I was a kid. Years later I figured out the reason was once, when I was young, I had a really nasty headache while I watched the movie, and from then on I associated the film with a nasty headache. Now I love it, of course. Fantastic movie.
Not a movie but a character. I absolutely hated George costanza when I was a kid. Now that I’m older he is my favorite on the show.
Didn't like Closer or Match Point the first time around. Now they are favorites.
Strangely, none. I can't think of any movie I hated and I now love. Maybe it's because I don't watch again movies I hated though.
Not a specific film but when I was younger I refused to watch anything that had subtitles. Now I enjoy them often and will always seek out a subbed version over a dubbed version no matter what.
Return of the Jedi. I used to think it was really boring for some reason, but now it's one of my favorites. I personally put it above Empire even, and I don't get the relative hate for it.
The Life Aquatic with Steve Zissou!
Just hated everything about it when I was younger cause it's so......Wes Anderson-y.But just out of nowhere, his movies just clicked for me and I love them.
Been meaning to rewatch The Grand Budapest Hotel too cause that was the last movie I saw of his I hated. But I just kept thinking of his style more and more after I saw it till I just loved it eventually.
Hated his style, hate watched TGBH, kept thinking how stupid it was till I realized I loved it. [Which was basically what happened to Homer with Clown College.](https://youtu.be/XyxvX1N9Tdg)
I remember kinda watching it with my brother when I was a kid. He had the collection on VHS.
He had the 1st one on the screen and I just thought it seemed really boring.
Fast forward to now and it's probably my favourite movie of all time.
I watched Side Effects when I was 14 and was really confused about the good reviews. A few years later, I studied Psychology and had to watch it again for a class, and I was pretty surprised how much I understood it compared to when I was in pre-college.
I hated the first Lord of the Rings when it first came out; it's now one of my favorite movies.