Nice film, I found enough enjoyment with it.
Probably not as deep or creative as it could've been, but I do like the plot of 'Santa Claus: The Movie' as it starts off at the embryonic stages of Santa. It ends up turning into a run-of-the-mill good v. bad thing, but that cause is helped by the casting of John Lithgow - who is entertaining.
Lithgow isn't the only positive cast, as Dudley Moore and David Huddleston do solid things too. It's interesting to see that Lithgow doesn't rate this, as well as the fact that it's apparently popular in the UK; though I, as a Englishman, had never heard about this before this year to be honest.
There are, at least in my opinion, many better festive films out there, but this 1985 flick is a satisfying Xmas watch. It's cheesy and features some questionable special effects, but does have pleasant-looking reindeer and has charm.