Travel agents seem to be reasonably adept at getting roundtrip airline tickets at convenient times, booking you into American style hotel chains and giving you a travel itenerary complete with plane, trane and opera tickets.
Some travelers like it that way, no hassle.
Others, like me, prefer to get off the beaten path, travel at my own schedule and find economic lodging without reservations. My air preferences are flexible when I can get significant savings. I spend hours looking at flight options online before deciding airports, days and times. I highlight at least 5 or 6 potential hotels, pensions, B&Bs for each destinantion so I have back-ups in case the first one (two or three) I call isn't available.
The only one who knows your tastes and preferences is you. A really good travel agent would spend hours learning yours (and then dump me because my style of travel doesn't generate enough income to be worth their time).