I am just afraid that, upon jumoping merrily into the water, I shall discover that my character has undergone the wolverine treatment in the past and his metal-coated bones cause him to sink to the bottom of the ocean like a flailing, drowning, possibly screaming, rock, which would cause me to lose untold hours of progress and smash yet another controller with my eyelashes.
I do like water in "Just Cause 2" though, since Rico is apparently a decendant of Poseidon, he can actually stay underwater for so long that every single enemy around him will forget why they were mad at him.
It helps that he is only fighting alzheimer patients (with surprisingly good aim) though.