Interesting. I don't really have *favorite* movies, either. I mean, I have lots of movies that I thought were great. And a fair number that I have seen more than once via the kids watching it as they have gotten old enough to enjoy it (came out before they were born, or when they were toddlers or whatever), or seasonal movies. But I don't have any that I would BUY so that I could pull it out and watch it multiple times.
A few I have seen multiple times (come on TV while I was folding laundry, or was sick, and I was scrolling and came across it, and didn't turn it off until its was over) are Pretty Woman, Ransom, Braveheart, Princess Bride. I'm sure there are others, but that's all the comes to mind right now.
One I have purposefully watched a second time (and seen like the above list multiple times) is Steel Magnolias. Really love it.
The rest are probably kids/animated films. The Incredibles is fabulous. Finding Nemo. The first Toy Story. Oh, and all the latest superhero films. I've enjoyed those with my teen kiddos. Captain America. Iron Man. Thor. The Avengers. Winter Soldier. Captain America: Civil War. Wolverine. X-Men. and so on.
But if you just want a list of something new to put on your list... there are tons of movies that I could recommend. I'm not big into RomComs, so there aren't many of those on my list of recommendations. Date Night is one. When Harry Met Sally was another.
The Man From U.N.C.L.E.
Bridge of Spies
The Nice Guys
(just in the last year... I know Spies is older, but we just saw it on Netflix last week.)
I still want to go see Jungle Book.
We actually own the Lord of the Rings Trilogy, and the Indiana Jones box set. Bought them more for the kids than for us (they were too young for LOTR when it was initially released, and weren't born when IJ came out. They LOVE them and have watched them on DVD multiple times).
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ETA:
I have found a few that my kids like that I also enjoyed, that my kids might rank in their top 15.
Besides Indiana Jones...
The Breakfast Club
Ferris Beuller's Day Off
(My son is 17... LOL)