It is all down to choice. You can have doors, but then you are stuck with doors all year. Or you can have a blanket (not both). I have gone for doors.
^Says it all.
I'm not here to say you're wrong, it's your choice and if it suits you then that's great.
From a frugal point of view, just looking at the finance for a Twizy Urban, which doesn't include options or the battery hire, would make me consider taking the bus instead or car share at least.