What the ideal shine would be for wood can vary depending on what real-life wood finish you're looking for. There are numerous types of shine and finishes for wood. Some of the basics are varnishes, waxes, and oils. (there's a lot more than that but that gets technical.) There are glossy (think those fancy grand pianos), semi-glossy (fancier furniture and wood trim might have this) satin (probably most common things) You'll want to adjust the roughness and specular to get the right settings, but without knowing the look you're going for it's hard to say what numbers to use.

Also, many finishes have a yellow tint to them which give the wood a rich warm look to it. That doesn't seem to be an issue in the image you posted, but if it starts to look desaturated then you might need to make some adjustments.

---

Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
Check out my store here or my free stuff here
I use Poser 13 and win 10