Adventure, a significant part of the "pleasure" of leisure, business combined with leisure, and even occasionally business travel, involves the planning, exploring and booking airlines and hotel rooms. I've learned almost as much "looking" as I have from being there. Discovering a hitherto unconsidered route, finding a hotel or room rate that excites interest, learning from the experience of others (and most TAs are short on the sort of experience which benefits me). Expedia, TV, PL, etc. are simply places to start or stops along the way.