I've never heard of using Osage.
Some people put the green balls around to drive away pests. If it works there likley resins in the stuff that aren't good.
I like Oak, then Maple, CHerry, Hickory, Misquite.... pretty much in that order. Some times I mix it up a tad but usualy It's the Oak and maple drops from my risers and wood carvings.
Oak is nice. Not overpowering. We like it for smoked turkey, Smoked Salmon and Smoked Carp.