The ultimate decision on all aircraft operations is the PIC (Pilot In Command/Charge). Ground operations are guided by controllers but ultimately every decision falls upon the PIC. Planes, and helicopters too, prefer to take off and land INTO the wind, it gives better lift and control.

A plane's performance is very dependent on weight. A slight tailwind on takeoff can add hundreds of feet needed to get off the ground so that's the primary consideration for takeoff. Planes are the heaviest at takeoff because they are full of fuel (JetA is 6 pounds per gallon) and need more length to get rolling and overcome the gross weight. If the winds are calm then the pilot may consider the weight and length of runway along with the departure requirements (Terrain or noise abatement) for his or her takeoff.

The AF and KLM jets are quite large, not as large as 747 but the A330 and A340 are large.

Bottom line is that the PIC makes the final decision in conjunction with the tower.