I checked out the creation of custom fields for a request form thanks to the great hint from Alina (support team). My goal is to be able to have all submissions on a table view including the option to export the data to Excel.
My test worked pretty good. The only problem is, that I have to ask about eMail addresses and names twice to get this data included. IMHO there should be the option to include this already present data into the list view without the need to create custom fields in addition.