I think it's a lovely house, but agree it's not quirky as such - it's just not a beige/magnolia/grey box.
One thing that strikes me is that none of the photos are taken with the lights on, as always seems to be the case these days. That says to me it's a very light house, even with some of the stronger colours.
I think I'd aim to get rid of some more of the 'stuff' as a first step, and retake the photos. I know what people mean about painting it, but that's not free, and if you do one room you need to do them all really. I think it could just look a bit better without some excess things. You've got some areas where there is nik-nak overload, and then others which look like soulless rooms (bedrooms) - I'd try and balance that out a bit more.
Clearly the bathrooms need replacing (but you know that), but the conservatory is the other room where most buyers would probably want to do work (other than cosmetic stuff). The beams and the water feature would be the most offputting things for me. And is that a polycarbonate roof? If so, I can't imagine it's ever a nice room to be in, but having a log burner in there suggests it's a room that gets used. For me, there's plenty of living space in the house, so I'd probably get rid of the conservatory (if I bought it, not suggesting you do that!) and make it into a nice outdoor seating area.
I would consider replacing the table in the kitchen with an island - like a big butcher's block on castors. Then it nods to the modern take on kitchens with islands in, without actually having one. The table (with single chair) is a bit odd. And the dining table is right next door.
I'd also stage the games room - that's a big bit of extra space which would be fab for a family - you've got a full size snooker table with a blanket over it!
My parents house was borderline quirky, for different reasons, and it took a long time for a buyer to be found (location was an issue there too). It was a hard slog, and they were desperate to move. But they got there in the end. Good luck!