Although far be it for me to consider myself a "snake expert", its early, I'm cranky and feel like adding my two cents.
All I have to rely on in my personal experience is the behaviours of our two animals, Fred and Weeble, a Ball Python and albino Cali King respectively. Researched to death, we are aware of their natural behaviours and penchant for hides and the what not. They both have enclosures where hides of varying sizes and temperatures are available. However, they also have a beautifully setup enclosure outside of their hides with branches for climbing, leaves for cover and a viewing area so that we can enjoy their company with little intrusion as needed. Call it curiosity, adapting to habitat or whatever but both Fred and Weeble consistently use their entire enclosure, climbing on the trees, sitting on top of their hides (and in Weeble's case, hanging out with his head stuck through the hole in the top of a coconut

) and just generally maximizing the space they have available. This may say different things to different people but my interpretation of what I have seen is that given the opportunity, snakes, either in general or dependant on character, will use space and elaborate enclosures if provided with them.
*throws two pennies on the table*
Take it or leave it.
Dee