OPW INTERVIEW - July 2 - eHarmony matches based on similarities, but some argue that matching people on complimentary i.e. opposite traits, makes life more interesting for the matchees. (onlinepersonalswatch.com)
Just as with couples, opposite traits in travel partners are sometimes an advantage, like introvert / extrovert, planner / spontaneous, leader / follower, etc.. (bigtravelnut.com)