Ah ha! A couple of weeks ago I was exporting some assets as obj and wondering why on import they were curving in odd ways. Set crease angle to 0, and ta da! Forgot all about that.

On the smooth polys, if I need them on an asset, I'll turn them off on everything in the scene and then turn them back on the items that need it. Thankfully, scenefixer does this in one shot. Generally, though, I find I only really need smoothing on things like tree branches and so on. But this is going to depend heavily on what sort of assets you're rendering, I think. A sci-fi scene full of precisely modelled architectural elements is going to need a lot more love and care than an old stone ruin where you can go crazy with bump and displacement.

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PoserPro 2014, PS CS5.5 Ext, Nikon D300. Win 8, i7-4770 @ 3.4 GHz, AMD Radeon 8570, 12 GB RAM.