If desired, you can enter name and e-mail address.
If in doubt about the character set to use, UTF-8 is the preferred choice. ASCII is a very limited character set which does not know special characters or accents. This risks loosing information.
When exporting the data to a GEDCOM file there is the possibility to exclude part of the data.
Since the ability to enter a patronymic in a separate field is not supported by every genealogy program, it can be specified how the patronymic should be stored.