If more than one modules are going to be used in a program i am writing, i would incline toward those which support OO interface to avoid name space pollution/conflict. Lacking OO interface from a module, i would import only those functions that i would need; i don't bother w/ using the package name. In case of (function name) conflict, i create my own wrapper function.

Due to the above reason, i personally write only the modules supporting OO interface.