The main on is too small... at the end of the day everything come down to size. I don't mind 3/4 stories (as long as every thing is a usable size not these 3 story hamster hutches new build developers knock out).
I also grew up open plan (long before it was fashion) and the entire down stairs of our house was open plan. We would only buy a house with separate rooms. I need lots and lots of separate specified purpose rooms (and cupboards, I need places to keep coats and stuff more than I need a pinterest 'reading nook').
I like the IDEA of a cellar but every house I have lived in with them have horrible issues so I acknowledge they can be a nightmare.
I like the IDEA of a garden but honestly I have no green finger, I'm lazy with that stuff and I'm terrified of lawn mowers (giant spinning blades, no thanks).
No coal fire, I grew up rural my whole life with them and my mam had one until she passed away. They are hard work and messy and I HATED it (was my job). I like the LOOK of wood burners/fires but I wouldn't use one, it would be decorative only.
I hate big kitchens, our current one is massive and the BANE of our life. They are just MASSIVE clutter traps (and insanely expensive to replace btw) but tiny 'cupboard' kitchens are useless too (viewed a house thats kitchen was 1.5m x 1.8m, it only had a sink, small cooker and washer, no room to move couldn't even have a door because it wouldn't open, fridge was kept in living room which is nuts). A simple galley kitchen or something (enough space for appliances and usable bench space) but no unnecessary floor space or cupboards is perfect.
Ditto with big bathrooms, should just be big enough to fit practically what you need. None of this 'we converted a large double bedroom into a bathroom. I shouldn't have to walk a mile from the bath to the other side of the room and theres better use for that space.
No tiles, I hate tiles especially in kitchens on floors. They are cold, uncomfortable, things shatter if dropped, grout is awful to clean and they become slippy death traps when wet (and give thats often where the back door is foot fall from the wet outdoors is usually common). I love laminate/wood flooring but if thats not an option I would rather have carpet than tile.
I honestly don't care about upstairs bathrooms, I have had both and honestly down stairs is easier (its where you spend most your awake living time so more practical... once in a blue moon I need to pee at night but I pee like 20 time a day when I'm working downstairs). I'm not running a hotel so the common argument of guests being embarrassed walking naked through the downstairs is bizarre (and who walks naked to the bathroom anyway... you go in and THEN get naked IN the bathroom).
Stairs in the middle of the house, it 'looks' nice but it often greatly effects the layout. It works in beautiful big houses and mansions with plenty of room but round here its common in tiny 2 bed semis and it means you can't change the lay out to do anything (like loft conversion stairs etc...).
I prefer old (pre-1930) houses to new ones (post-1930s) because new ones are tiny and terribly designed.