I think the floor looks pretty good in the above picture.  If you go through Face Off's tutorials just make sure you take into effect whatever Poser Display Units you're using.  I will effect scale.  Because I don't really understand it all that well, I tend to use stock values for props, floors and walls, and other stock values for figure and figure body parts.  I've have these written right at the top of render notes I keep.

If you use certain toons alot, certain characters you like to use over and over, you can apply all of the nodes and then save all of the characters groups to the Materials library ...

I DO have a number of light sets that use AO, but when I use them I kind of gotta bite the bullet and expect long render times.  Sometimes that's worth it too.

Best Wishes,
Rªnce