I live at the beach so all the houses are built on sand dunes, therefore 30-35 degree driveway is the norm, with low clearance cars you have to go into it at an angle, anyways I have never experienced those issues on the extreme slope (I never left mine there for extended periods of time though) - and as for getting in and out of the car, it's generally a challenge (like falling out of it)

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2006 BMW X5 4.8is Lemans Blue/Beige/Dark Maple
-Nav, Comfort Seats, Heated Steering Wheel,
Rear Airbags, AUX Input
2009 BMW M3 Space Grey/Black/Carbon
-all options