Um inside corners are the hard corners because you have to cope the intersections or youll have gaps. Also, idk, it's your house, you must not vacuum much or something. We ram that vacuum into the wall so much... All the rooms I redid have painted, clear, yellow pine moldings and the bottom course of drywall is level 4 finish on abuse resistant 5/8" panels (you cant dent them, or put pins in them).
Youd figure with kids you'd be more hip to making everything durable.