So I've only been using the Maille brand Dijon mustard until recently, and while I did like the flavor profile, it was waaay to strong for me. So I decided to try some other brands, and well, the only thing Dijon mustards appear to have in common is mustard seeds, white wine and Dijon in the name.
I've had a few which were very mild, like Edmond Fallot, and one which was a bit stronger but still mild like Grey Poupon. Especially the Grey Poupon was perfect for this grilled ham I like to have in a sandwich.
Of course, now that I found a new favorite mustard, it's sold out due to the mentioned shortage on mustard seeds...