Shogun sucked because it was badly made and the novel itself was preposterous. Lord Toranaga was supposed to be the same as Tokugawa Ieyasu, but in 1600, Tokugawa had already eliminated the opposition. Clavell really screwed the history, because Tokugawa was not an old man in the contextx in which he set his novel, but his character Toranaga was.
Gettysburg sucked because it was bullshit. Not only was the motion picture based on actual fiction, it was based on the
novel Killer Angels which was itself bullshit.
For pure escapism quest movies, i recommend the Lara Croft movies--the plus side being Angelina Jolie.