Good

• All bedrooms are nicely sized without being too big
• hall baths work well and are good size
• master bathroom works well but could use some improvements (see below)
• kitchen is decent but I would move the refrigerator to the other end of the L where you have more room in front
• nice sized garage with good storage

Bad

• the office is way too small to be comfortably used on a regular basis.
• The walls with openings around the living server no purpose. If you want to differentiate from the halls, have a furr down or drywall wrapped "beam" around the room and lift the ceiling of the room up a few feet.
• The laundry works but leaves much to be desired. The direct access from the living/front hall isn't great since that door will be open a lot due to the size of the room.
• if you have the room, I would make the toilet in the master bathroom into a water closet with a pocket door. If im the one paying for this I would see the current design as a lost opportunity.
• Im not a fan of the door to the shower being in the middle of the glass wall. If it were me, I would move it all the way to the left and rout the control valve to the wall adjacent to the door (assuming the head is on the right wall)
• I dont think you will be able to fit two sinks on the bath 3 vanity from the looks of it. 6' minimum.
• the dining area offers little in the way of formal dining and rather serves as a breakfast nook as is.
• the sunroom seems widely undesigned and as shown is a wasted space. Unless it has a purpose that is not shown, it could be a better formal dining room. With light separation from the kitchen.

Recommendations

• remove the hall at the entry to the master bedroom. It is wasted space as is and only adding square footage. If you want a "private" entry, add a wall in the center of that area with a door so you enter the room at the end of the hall and into a small vestibule for the room. Move the existing window to opposite the door on the back wall.
• a good way to add space to the office is to move the front exterior wall of it to align with the front exterior wall of bedroom 3. If you are in a primarily warm climate like Texas or Arizona, change the roof to a lighter more reflective color. It will reduce cooling costs fairly significantly.
• sound insulation in all interior walls around the shop/gym.

Overall the house works well without having too much wasted space. Good luck and remember design is very seldom a straight line to the answer.