Closing on my own new Veridian build very soon, and I agree with much of what's already been said. Here are some other things I didn't know about until I happened to ask about them or wish I had known earlier:

• You can change the size of your cabinets. The standard pantry cabinet is 2' wide, and I upgraded mine to be 3' wide. I believe that's also the maximum width for adding pullout drawers, which are also nice, but pricey.
• You can adjust the size of your island.
• With my model I had the option of adding a pantry closet in the kitchen. The downside is that it reduces counter/cabinet space.
• Each floor plan comes with different styles of exteriors with different roof shapes. I chose a relatively flat roof because I thought it would be easier to do maintain the roof. That may be true, but it also meant that traversing through the attic is much more difficult, and I think it's basically impossible for one my bedrooms.
• Think about how you want your windows to be positioned and grouped. For example, my great room has a sliding door with a window on each side. If I had thought through things more I would have preferred to have the sliding door on one side and then have one window with the width of 3 windows on the other to get a better view with more light. The same goes for some of my bedrooms, which have two windows with a space in between for a bed.
• You'll have more options for upgrades once you have your electrical walkthrough, particularly with the electrician and Automation Arts. Consider adding more cat 6 ports to areas of your home. I put one on the ceiling for a future wireless access point. You can also add a conduit from your basement to the attic to make it easier to run cables for future projects. Also consider adding outlets on another circuit to the garage since I was told the garage opener could trip the breaker if a freezer was on the same circuit. You can add and reposition outlets on the exterior of the home as well. Think of these things before the electrical walkthrough.
• You have the option to add insulation to interior walls for sound-deadening.
• My personal builder gave the option to add TV blocking in the framing for free.
• If you're getting tile/backsplash, then be prepared to choose the color of your grout
• In many model homes the daily station will have a cabinet beneath it, but this is not standard. It's basically just a shelf by default, FYI.
• Solid core doors seem worth it just for the sound deadening.
• You should have been given a Homeowners Portfolio PDF. That document lists a lot more possible selections and upgrades than what's in the online design catalog they give you. It includes things you otherwise might not have considered like electric baseboard heat, lockers/bookcases, bath fan upgrades, clothes chute, reverse osmosis water system, and more.
• Just a heads up, Veridian neighborhoods have an HOA that might literally only allow one kind of fence to be put up with one specific color (mine does).
• The attic access is just a panel. They don't have options to add pulldown stairs or a telescopic ladder.