For me its Etoile de Bessèges...
Leaving aside the TdU and the couple of races in the Middle East, and Langkawi, the European season traditionally kicked off with the Etoile de Bessèges in France. That is the first real race where there is participation by all major teams and a cross-section of decent pros from various countries, not just the host nation. Then there is the tour of Mallorca the week after... Not really a "tour" but a series of one day races...
Mallorca is usually seen as warm up for the Tour of Med which is the first major target for the early season stage racers.... Most Paris-Nice contenders will have a number of days in their legs at this stage...
Het Volk is the traditional season opener for "northern classics" and those who will be fighting over the cobbles in March and April... it falls on the same weekend as Gran Premio Lugano (which was originally called the "Season Opening Race")... GP Lugano caters for riders who will also fight it out at Paris Nice or Tirreno Adriatico. Many riders who ride the tour of the Med will ride GP Lugano.
Last year GP Insubria was held the day before Lugano... the same teams rode both races....
Paris Nice is a relatively late start if that is your first race... If so, a rider would be late on form for the first classics... such as MSR which falls the following week
