Assuming you have seen all three and have a favorite.
I just watched the 2005 version staring Jack Black. I found it boringly long and the least realistic script of them all.
The 1976 version featured the World Trade Center's Twin Towers and was alright.
But I still remember seeing the 1933 version on TV when I was a wee lad and I still cringe when I hear the Beautiful Dreamer music. So it was my favorite. Plus if you see the uncut version, there's a glimpse of Faye Wray's boobies.
To tell the truth I liked both Mighty Joe Young movies better than Jack Black's Kong.
What say ye all?