system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why do some people blackout and lose control when they are drunk while others are perfectly fine?

Whenever I get drunk I always know what's going on around me and what im doing, and I always remember everything the next day, even if I'm totally completely absolutely wrecked.  
But I have friends who get just slightly drunk and completely lose control of themselves. They do things they would never normally do, like take off all their clothes and run around, and then not remember anything the next day.  
If that happened to me i would never ever drink again. I tend to be loud and cheerful but i never find myself doing something i would regret.
gpt
Blackouts are a function of the level of intoxication. Some people have higher or lower tolerances, but mostly, it's a matter of self control.

Quite simply, they're taking in more alcohol than you more quickly (relative to their body mass), resulting in a high enough blood-alcohol level to induce blackouts. You, however, never reach that point due to the way you consume. It might just be a preference, it might just be personality. 

Most people don't find that level of intoxication, loss of control/memory, and impending hangover to be enjoyable. They usually regret it, but a lack of control or awareness means that they will repeat the performance.