I think it's funny that you can spend literally hours on these boards interacting with dorks like us but you can't bring yourself to watch all 95 minutes of Princess and the Frog (which could be remedied by just letting it play in the background while you interact on these boards with dorks like us).
It's always been a bit weird to me that so many on here just don't watch the animated films, or ignore all but a handful of ones they loves. Some are even flatly dismissive of them as a whole, even knowing that we wouldn't even be here without Snow White and Cinderella because there wouldn't have even been a Walt Disney Company that would have been able to make Disneyland in the form we know it.
But then I guess I can't be too surprised either. I'm primarily here because of the parks, and everything else Disney does comes in at a distant second for me. I've seen all the animated films, but there are only about fifteen or so that I couldn't live without, and I'm largely neutral on the rest.
Not finishing movies is an unforeseen consequence of watching at home. I can think of precious few that I've walked out of in theaters, even real stinkers.
I'm in the odd situation where I've walked out of some real beloved classics that everyone else loves but were just too long for myself and/or my parents. I guess I'll never know what happens during the rest of the first Pirates movie or the first LOTR movie. There are always some fun reactions that come from dropping that info! Maybe someday I'll give Fellowship another shot at some point, but first Pirates, no chance. Mostly we left because we were just ready for them to end and they simply would not.
The only one on that list that I actually want to watch is Onward. Not saying I won’t watch the others (some of the others), but I’m not necessarily interested. I’ll try and watch Onward this weekend or next weekend.
I'd say Onward is skippable. It's yet another one that is too contemporary for its own good IMO. Of the others listed in the post you quoted, I would recommend Bolt most. I haven't seen it since its original release, but I remember it being a charming movie. Cars 3 is better than I expected but not something you need to see either.
My dark spots are Fun and Fancy Free, Melody Time, Make Mine Music (I think at least for these three but I guarantee I've seen clips or some of the shorts), Brother Bear, Home on the Range, Meet the Robinsons, Fantasia 2000, Winnie the Pooh 2011 and Strange World.
I really should just go and watch some of them at some point, but it's almost a point of pride I just inadvertently skipped a lot of stinkers.
F&FF: The Bongo segment is at the very least too long, but Mickey and the Beanstalk and off-model Jiminy Cricket are nice enough.
MMM: The Peter and the Wolf segment is the real star here, Blue Bayou is gorgeous, and the rest certainly exists.
Melody Time: Like MMM 2.0, but everything is better.
BB: Some pretty animation, but you can see the "twist" coming from a mile away.
HOTR: Honestly better than most people will lead you to believe, though it's certainly not a classic. Surprisingly decent soundtrack and the yodeling song is a gloriously strange moment of the likes that we haven't really seen in a Disney movie since.
Fantasia 2000: This was my last Disney movie I needed to see. It probably tells you a lot about my frame of reference that my first takeaway was "OH! THAT'S where that CGI whale in Tokyo's Fantasmic comes from!" Honestly much better than I expected it to be and probably the best film on this list by a fair amount.