choice.
I agree. I have steered away from WT because they "encourage" participants to switch roommates every night so that everyone gets to know everyone else.
I like sharing with other people who I know already before a trip...maybe I'm just particular. Chances are, I will jive with 1 or 2 out of a whole bunch of women. But I didn't know this practice of theirs and will ask someone who I know did 2 of WT's tours.