In some markets, your quantity supply of labor would be zero because you are willing but unable to perform the task. In some markets, your quantity supply of labor would be zero because you are able but unwilling to perform the task. Your labor supply to a particular market depends on your ability, your preference, and the opportunity cost of your time. Utility can be found in leisure. Leisure time is time spent relaxing, sleeping, eating, and recreating.
Leisure is a normal good.
It is also subject to the law of diminishing marginal utility. The more leisure time you have, the less you value each additional unit. Like the idle rich, you would grow bored with no work just leisure. This is selling your time in the labor market in return for income. With this type of work you usually give up some control over your time and this control is given to your employer.