This is going to sound risky, but when you sit down in the chair, and they ask you what you want, just vaguely let them know and don't get descriptive. Any styling questions outside of the broad "longer on the top shorter on the bottom, a fade, etc" just say I'm gonna trust your judgement on that. I used to get my shit fucked up constantly then tried the hands off approach and have never gone back. I don't even have any one barber, works pretty much every time.