Is there some reason you're avoiding Casablanca ?
For me I think it's because I just avoid watching romance stuff altogether, reminds me too much of various bad decisions (there are exceptions,
The Fifth Element is too good to pass up). Plus I still enjoy not being in a relationship, so I can't exactly relate to romantic plots often.
I am shocked, shocked that there are people who haven’t watched Casablanca.
People are allowed to have preferences in genre are they not?
No!

Everyone should be like me! My list of favorite movies is very eclectic; I like a variety of genres, as long as they are very good movies with good acting, good script, interesting stories, and a good mix of drama, thrills, humor, etc.
Wikipedia calls
Casablanca a "romantic drama" and if I click there I see 41 examples of "romantic dramas", of which only
Casablanca and maybe
An Officer and a Gentleman would get high recommendation from me.
So I don't like the Casablanca "genre". I like THAT movie because on a scale of 1 to 10 it ranks about 25 for its "genre."
Across the Universe (1970)
Across the Universe is the only musical I ever liked. (unless you consider
Hard Days Night a musical.) I bought the
Universe DVD and play it often.
I'm glad to see SOMEBODY agreeing with me about something! Another favorite musical is
Amadeus. Among traditional musicals only two Rodgers and Hammersteins rank high for me --
Flower Drum Song (funny, poignant, sentimental, good story) and
South Pacific, sentimental story, with Ezio Pinza singing "Some Enchanted Evening" worth the price of admission.
The musical
Singin' in the Rain -- #10 on the posted AFI Top 100 -- is hugely over-rated. Speaking of that AFI list, i may be a "movie buff": I've seen 47 of the Top 50.

(Though it's only 44 if we ignore 3 I've almost completely forgotten.)
What’s that Christmas movie with jimmy Stewart? Never seen it despite it being shown every damn year. I’ve only seen snippets when I sliced past it on the TV or it was shown in some shop or restaurant around Christmas time.
It's a Wonderful Life. Since its talked about so much, I decide to sit myself down and watch it a few years ago. I found it kind of boring, and stopped watching before it got anywhere. So, a bit overrated IMHO. Maybe when I'm 97 years old in a nursing home and I find a fly on the wall to be the highlight of my day, I'll give it another go.
VERY boring, and almost pointless. Many Jimmy Stewart movies are very over-rated. I continue to be amazed that
Vertigo is ranked so high. I consider it the worst among all Hitchcock movies. Boring, and with an uninteresting and unrealistic "twist" ending.
Jimmy was surprised
The Graduate -- quite uninteresting IMO -- is ranked high. I think this 1967 film was supposed to reflect a generational change in American values, so was supposed to be "important."
Network -- an unworthy farce IMO -- also makes the AFI List for similar reason.