As others have mentioned, check out the gel coat and i mean really check it out. Take a flash light if need be and look it over.
You want to check for any swirls, cloudiness and cracks. Check around the pop up cleats, rubrail screws, the rear eye hooks, tow bar and tower feet for any spider cracks in the gel/fiberglass.
If you know how to check for air voids check the swim step platform at the rear of the boat for any air voids that will pop and crack the gel coat.
Make sure the walk through window opens and closes with out any issue and doesnt need adjustment.
Look all through the vinyl seats and make sure you have no loose threads, excessively loose seat skin, make sure the stadium seat slides in and out with out binding up. Also check the rear hatches and make sure they line up and close with out any problems.
Depending how well the dealer detailed it before you picked up you shouldnt find any random fiberglass pieces, nuts, bolts, washers, zip ties and other random things from the build but these items do get left behind.
Ballast- the PnP is easy to install but the way axis runs their rear drain lines is a little kooky. For everyone talking about the auto draining lines their is/was an issue of where the rear vents were installed. One way to also fix this is to have your dealer pull off the panel that covers the rear PnP line and make sure the small vent on the ballast looped is slightly cracked open.
The knob at the top/center of this picture is the valve im referring too.

The other issue with the rear ballast lines will be your fill hose that comes from behind that wall to the top of your bag will kink due to the extreme bend. This will severely slow your fill times. To fix this, have the dealer install a 90* elbow fitting like below.
90* elbow fitting for rear PnP

90* fitting installed

As for everything else, the dealer should go over all that with you. How the boat handles when docking, trailering, reversing etc.. Make sure they show you the perfect pass, surfgate, how to calibrate the speedo and run the perfect pass on either RPMS or speed as well.