Here's the plans for a home I designed. 1820 square feet. We're pouring the foundation today.
Love that you designed it yourself. Love the relatively small footprint. My house is a raised rancher, and I like efficient interesting spaces.
Not fond of the master bath being adjacent to kitchen, utility (presumably laundry), and garage. All of those can be loud and/or smelly spaces, especially the kitchen. Not much to change about it. Maybe make sure the wall between the kitchen and bedroom is sound-deadening. Not sure how I feel about the diagonal double doors on the bedroom leading to the bathroom and then another door on the WC within the master bath.
Consider that if you drive home with the shits, you will have to open the garage door to the utility room, then the door to the master bedroom, then the double doors to the master bath, then the door to the WC in the master bath. Basically see if there is a way to limit the doors in your design.
The interior walls of the study should be ditched (basically scrap the study). Remove the diagonal doors that waste space and allow the living room (great room) to have as much light and space as possible. Lose the east wall of the utility room, again doors.
I don't see much value in dining rooms. I would consider losing the east wall of the dining room and including the covered patio in the plan of the house. Make the north wall of the patio as much glass as possible. If you have the bucks, make it a sliding glass wall that can be retracted. (no clue what the surrounding property is like; some of this is only if you have a view).
Put water connections and a washtub on the north wall of the garage (I know the utility room is close by, but it's a pain the ass to be dealing with doors and doorways all the time). Every handy person should have a fully functioning workshop.
You could have the fireplace available to bedroom #3 and the patio, too.
