issues with 3 levels. (basement, main floor, 2nd level) is having "doors" located in good spots. to help keep heat and cool air were you want them between each level. and then relying on kids to make sure the doors stay shut.
i remember my aunts house long long ago. had a door at bottom of steps and then at top of the steps. and it really did help keep a lot with kids including myself and keep warm or could air were it was wanted.
having kids rooms over your bedroom is a bad idea! and you may not get much sleep, more so when it is summer vacation and kids are jumping around with there music or video games cranked up.
============
you have multi bathrooms!
my big grudge, is coming in from the outside, and having to walk clear through the house with mud to snow to other getting on everything. being able to walk from garage, right into a bathroom with a short hall way if that. for me is wanted. when i gotta go, i gotta go. and it tends to be a pain to take muddy boats off, extra cloths, etc... to get through house just, to "GO"
but it is not the garage but also coming in directly through outside from the back yard, and short distance into a bathroom. and dealing with mud and like.
getting into the kitchen both from garage and from outside,is also one of them things. and would prefer a door that opens directly from outside into a kitchen. or short hall way. that is either hard wood floor or tile or like. it is from drinks to eats to snacks. and if need be to wash your hands / arms / neck / face off. from swat, grim, dirt.
as you, i do live on an 80 acre farm. and having the abilty to get to the bath room and get to the kitchen from both garage and directly from outdoors. is a big thing. once i come in for the night that is a different story.
=====================
to be honest, i am not a big fan of main front entry door that is centered in front of the house. i use rear door, side doors and most all of the familys/friends do as well on there homes. and the main front entry door is rarely ever used exception of someone wanting to sell something. if you want the look of a central main front door of the home, that is grand, but never really has never been functional, in homes that i have been in.
driveway to were car/truck gets parked the most, to nearest door into house is what will get used the most. from loading up vehicles with kids and like, to bringing in groceries, to stumbling in form a long day of work.
on a quick note, the only times front doors i ever do remember being used in any family / friend home has been to move furniture in /out. or when a kid, was forced to use front door. due to parents only gave me key to the front door. and only reason? i think they wanted the front door to be used for something. it was same with other friends parents....
====================
one thing, that has always been high on the list. is having an indoor grill built into a fire place. the current house i live in here on the farm has one. WOW! talk about nice! there is a fire place down stairs, and vents for furnace, hot water heater run into it the brick fire place, and the main level has grill that is in the kitchen. it is just a charcoal grill. but has been used a great deal. vs trying to mess around with outdoor grills.
to be honest, fire places never really ever get used, in any home i have been in. and the few times they due get used, is when someone forgets to order LP gas for heating, and ran out. and it is a quick jump to get heat back into the house. or wanting to just set back for a night and relax watching a fire. but after that night is over, fire place does not get used for some time there after. and fire place takes up a huge wall space and limits of were you can change furniture around. and to place a TV, and keep sun off the TV to watch it. many times i have seen a fire place get moff balled and some make shift stool or bench is found to be placed in front of fire place. to make room for seating.
on other hand, i end up more around a camp fire out doors, than dealing with a fire place indoors.
===================
overall outside walls of house and garage. go all over the place. you are going to be paying a hefty price tag, for siding, insulation, heating, cooling.... not to mention extra for shape of the roof to deal with the odd shape of things. then to top it off you will be doing some major weed whacking / weed eater duty. vs being able to use a lawn mower around the house.
as much as square / rectangle house stink as far as eye candy / looks. they reduce cost, a lot of ways.
a porch that wraps around the house. always thought they looked cool. but reality, just something more to take care of, and never gets used. the only time a porch the wraps around a house seems to be useful, is for restruants or places that have lines of people waiting in line to get in.
i rather have a porch area that is wide and long. so i can set a table on it. with chairs and benches. so when there is a party or like, everyone can be outside if it is a good night to do so. and if need be place a grill or "fire pit" into the center of it, and let people set around the fire pit, or to grill and come right into the kitchen.
===================
again with entry way doors into the house, from driveway to main parking area, also garage, and then from back yard into house. being able to get to a kitchen and bathroom easily. been in way to many homes, were the carpet starts right there, and you can tell the door has been heavily used due to carpet is smashed and stained, and torn up and flattened. not to mention once you get shoes off, you end up in "wet spots" on raining days, wet days, snow days....
for me, being able to have space to set down a couple bags on a bench or like, enough space to walk with fear of walking on carpet and muddy something to bad, to take off coat, and then being able to set down to take off shoes / boots. and then being able to pickup bags and walk into house with getting feet wet or muddy. can be a big thing to some.
===================
at moment i think ya stuck on eye candy, vs function and usability.
and you also have a basement! not included in diagrams?
if you are going with basement, main level, and second level. make bigger rooms for the kids, or like. there been a lot of times having a nice large rooms of a house that get taken over for various projects. and by the time you get some shelving, a good desk, lighting, those small rooms. become like cramped little closest. most kid rooms i have been in. seem like a jail cell. get a bed, some shelving, a dresser, a lamp, a small table. and you are walking side ways hoping you do not bump into something. with above put a larger kid room up above, with a guest room and bath room. then put another larger kid room down stairs in the basement.