This goes both ways. I've met many people who seem to be just as 'normal' as the people around them, but suffer from their behavior. Especially when it comes to

This goes both ways. I've met many people who seem to be just as 'normal' as the people around them, but suffer from their behavior. Especially when it comes to alcohol, I've noticed that identical behavior over time can diverge: one person might just stop drinking as they grow up, while the other ends up being unhealthily dependent on their drinking. And the latter situation seems fine and might even go unnoticed by everyone... until it suddenly isn't (break-up, being fired, depression).