A while back I did an extraction, and after getting almost .75g's from 100g's of MHRB, I decided to leave the third pull in the freezer for a couple weeks, and see what happened. Well, I got another .75g's of nice fluffy, yellow powder. My question is, is this last pull all good Spice, or is there more impurities in it because I left it so long? I do plan to recrystalize it, but I'm just curious what some of your thoughts are.

Venturing a guess, with the amount of time it sat and the amount of 'stuff', I'd guess the NPS pulled some plant oils along with it.

I personally think the longer you leave solvent in the freezer, the better the chances are you are getting all of the spice out.
People keep the solvent in the freezer for 6 and wonder why they didn't get much. Time for the precipitation to happen.

The pic looks ok to me. If you are worried, then just do a re-x and the see what falls out at the bottom.