Surely not just for sunny days.......

[Top_Ramen]

Simple answer as to why I keep mine seasonal, SALT! They love to skimp on the actual plowing of the snow and instead just dump loads of salt on the ground to melt it in Chicago. As far as top down driving, the Box is pretty much top down every time I pull out of the garage.

[Giller]

Why do people always go to the 'posers' argument just because someone does something different than them? I love driving my car, but there are times putting the roof down makes no sense, such as if I'm heading to a business meeting and need to keep presentable.
As to temps....well, temp itself is not the deciding factoR alone. It's a combination of temp and sun. A nice clear sunny day? Top usually goes down if temp is in double digits (Celsius).