When you need a simple form for a single table or query, AutoForm is the answer. Once the table or query is selected you are one mouse click away from a generic form with controls for every field in the table or query.
Wizards make it easy to create a form from multiple tables. Wizards also give you some control over the layout and style of the form that is created.
It's often easier to first create a form with a Wizard or the New Object button and then use Design view to make any necessary changes.