I would like to change this ticket to "Save status of all check boxes in the sign/encrypt dialog".

This is triggered by a customer feedback, where they usually encrypt via password but sometimes with public key. This would make the dialog more user friendly for every possible use case.

Do you see any drawbacks? Could this maybe trigger issues with GpgEX?

I think this will make the dialog less user friendly because with this change one always needs to check the status of all check boxes. Without the change the check boxes always have the same status when the dialog is opened the same way. Predictability is very important for usability and even more for accessibility.

I propose to allow configuring the default behavior of the Sign/Encrypt action: Sign & Encrypt, Encrypt for me, Encrypt for me and others, Encrypt with password. The display name of the action (in toolbar and menu) would change accordingly (but only from "Sign/Encrypt" to "Encrypt" for the latter three settings).