I'll look like him. If I look like him, then at least people would think it's kinda cool. Hell, I'd probably get famous, which would hopefully get me to avoid being experimented on. If I talked like him, then that's just called having a speech impediment.
25914 liters divided by 365 is approximately 3.22 liters. 8127 days divided by 365 is also approximately 22.6 years. Meaning that the person in question remained very well hydrated over the course of his life by drinking over 3 liters of water a day. And that's including when he was a child.