Though they insisted on being refered to as 'Tok'ra' instead of Goa'uld, they do show the essential colours of their species, as Sean3w (?) rightly said, greedy and selfish. My example of this is the fact that however Martouf endeavoured to understand Sam, it was hardly below him to re-introduce the propect of her becomeing the new host for Selmak. Basiaclly, the mere facts that they do not take hosts forcibly and don't make use of the sarcophgus, for obvious reasons, BTW emphatically known by Daniel it seems: "I'd vouch for that", cannot diguise the facts that uderneath they, and the Goa'uld, seem just as bad as each other.