No one has mentioned this yet, but I like to set my vaporizer temp just below where the taste changes from pure thc to a popcorn taste. This changes a bit from bud age, type, and moisture for me (or maybe this is just preference). I wouldn't obsess about the perfect temp for everyone else, be flexible with it, but the beauty of the vaporizer is you can elude many of the toxins if you keep your temp low enough. I am usually somewhere between 290-360 degrees.