Charles Dickens' A CHRISTMAS CAROL is one of those stories endlessly adapted to screens big and small (not including pseudo remakes with twists/gimmicks on the same basic plot), everybody knows the story and even beats/scenes alot like Jesus and Batman, but regardless it's a yearly ritualism at Christmas along with the Grinch, DIE HARD, and that wool sweater Grandma gave you that you must lie with a straight face how happy you are for it.
As for which version is best? I don't necessarily think that is the answer, as much as which film adaptation is the one you grew up and most familiar with whether it be Mickey Mouse or Alastair Sim or Muppets or Patrick Stewart or Albert Finney singing (why?) or whatever. I guess some kids a few years from now will include Jim Carrey too. (I would also include the meta-parodies of this story like Bill Murray's SCROOGED or Black Adder's special.)
From that approach, my pick would be George C. Scott's version, which indeed saw alot as a kid on TV. Not the first variation of that story, but the one that stuck with me the most. (Though Michael Caine/Muppets and Mickey Mouse both tried their best.)
I love that the movie, unlike almost every other version, doesn't cut or water down the activist politics of the source material. Dickens originally wrote it as political propaganda to shame the rich, the government, society and so forth to quit being so fucking apathetic about the unbelievably horrible living conditions for the poor, working class in that era in British history. I liked that scene the family living out in the cold, the father wanting work but can't get it so he has to steal. I can't decide if I'm impressed or depressed that the politics, if of course times and geography have changed, are still relevant today.
Second I liked the use of shadows, the attempt at atmosphere in the 3rd act, death overtly hanging over this possible future.
Third, Scott's quiet dignity. Even when Scrooge is being an asshole, he doesn't fall into temptation of hamming up how evil he is, but he's an asshole because of how self-aware upper class posh and respectable he delivers those lines. Certainly reminded me of Mitt Romney. When all those buried demons of years ago dig themselves out, Scott's restraint tells his inner turmoil and evolving mindset much more vividly and effective than simply monologuing it. I like to believe it makes this morality play of redemption, even in one so well read/seen as it is, more powerfully persuasive.
(Of course I do find it odd that Edward Woodward wasn't Ghost of Christmas Future instead of Present since he is the Equalizer after all. Nevermind that the MCP is Bob Cratchit and is married to Superman's Krypton Mom. They surprisingly make a really good couple, and again for scenes that people can sleepwalk in their heads, they make that family unit more organic and that whole power of family singularity message Dickens was pushing hard.)
I did notice one thing. When I Netflixed this movie, there wasn't a scene that I swear I remember seeing in this version as a kid on TV where Scrooge 'dies' (or goes to hell, whatever) and gets chained up as Marley prophecized. But it's not in this DVD. Either I imagined it, or it was one of those infamous deleted scenes they add to TV cuts to bump up the running time.