For the sake of having the bullet points:
Do you keep more fresh or frozen foods?
Frozen
Do you want frost free or not?
I don’t believe chest freezers can typically be frost free?
Do you have any restrictions on size, especially height with fridge freezers?
As narrow as possible, under counter form factor (~40cm wd, 85cm h, 65cm dp)
Will the machine be in a room at normal room temps (18-21C)?
Yes
Do you store a lot of bottles, wine etc.?
No