Surnames

Almost, but not every, main character in the series, shares a surname with the lead singer of the favourite band of the actor originally meant to portray them, during the filming.

Examples:
John Miller (was originally going to be Davis, after KoRn, but the writer wanted the characters name to be John, so calling him "John Davis" wouldn't have been so much of a small nod as a gaping obviousness. It was considered jarring and the second favourite band was chosen instead.

Jolt Taylor

Moss Grohl

Mina Kowalewicz

Ash Kiedis