Too much space- looks like it would not be cosy in the winter and cost a fortune to heat.
Move your living room furniture away from the walls- at the moment the coffee table is so far away from the sofas that you’d have to get up and walk to it every time you put your cup down.
The photo of the lovely modern bathroom with the black shower enclosure is spoiled by all the shampoo and shower gel bottles hanging in the basket, you should have moved those out of sight for the picture. Unfortunately that bathroom is so nice that the old-fashioned state of the others comes as quite a disappointment.
As someone else said, too many bathrooms to clean.
Far too much orange wood everywhere. I’d be pricing up the huge cost and effort of painting it all.
“Formally a B&B”- with agents that bad at spelling/written English I’d be questioning their competence generally.
I’d also be wondering why you clearly got fed up renovating and decided to move on.
Did you ever run it as a B&B OP? If yes, will you be prepared to talk to potential buyers about running it as one again?
Is there a pic of what is inside that garden room? Normally they are nice to have but with the size of the house and annexe it just seems unnecessary.
Sorry to focus on negatives, lots of lovely features too. the condition of your lawn is fabulous!