Start forms are great because they don't actually start the process. This means if the user closes the tab, they don't have a task lingering in their task tab and no process has started.

1. Typically if the user is initiating the action such as clicking on a related action, start forms are best.
2. If the user needs to be assigned a task, then the User Input task is best. I almost always prefer start forms.

When to Use User Input Tasks Instead

1. Assignments: When the task must be assigned to a specific user or group who did not initiate the process.
2. Audit Compliance: If you must capture every time a user opens a form, even if they never finish it.
3. Complex Pre-processing: If you need to run multiple script tasks or complex business rules before the user sees the first form.