How do I objectively judge tea

HI All

I just received a box from China with about 20 different types of puerh, mostly greens but also some blacks. I know there are several accomplished reviewers in the group, what is the best way to objectively compare and otherwise judge a variety of similar teas? I want to eliminate as many external influences as possible and try to level the playing field.

Thanks,

Mike Petro snipped-for-privacy@pu-erh.net