keep in mind that BP's are not exactly display snakes. they sleep during the day and may come out at dusk or at night. they basically hide all the time. but when they do, it can be pretty neat.
So my girl Elphie surprised me when he first burrowed:
and she likes to climb:
every BP has a different personality and again, they like to hide. just keep that in mind when it might seem like u have an empty tank.