Congrats! Here's a quick run down of some important stuff:
-Test drive, as you said
-Check panel alignment (If a hatchback, take special note of the hatch and tail lights)
-Try all buttons/toys (especially MFT)
-Check it in the sun - Look for light/dark spots in the paint, swirls and scratches, rock chips too
-In short, check everything to be in perfect working order and in new, mint condition.
2012 YB ST-Converted Focus Sedan [Performance Ford, Sept '14]
1992 BW Grand Prix SE Sedan [restomod project]