5. Rocky IV
Rocky IV isn't a great movie. It barely even qualifies as a good movie, but it remains a guilty pleasure for an entire generation and never fails to entertain.
Sly Stallone's fourth outing as cinema's favourite underdog has a wafer-thin script, is hammily acted and is light on narrative progression. So what makes it so fiendishly addictive? Two things: montages and punch-ups.
Nothing gets your blood pumping like a good old-fashioned montage, and one third of Rocky IV is made up of them. Stallone used any excuse he could get away with to launch into one, whether travelling to Russia or reflecting on the death of a friend.
The rest of the movie's runtime is Apollo Creed getting the snot beaten out of him and the over-the-top slugfest between Rocky and Ivan Drago, which should have left both men dead several times over. Both fights are almost pantomime-level comical, but to quote Russell Crowe in Gladiator, are you not entertained?