Check all these related thread:

http://search.rcuniverse.com/search....hwhere=subject

Crosswind coming onto your face is cleaner and less turbulent than crosswind coming from your back.

Besides, the first type will push the tail first and will point the propeller away from the pits, while the second one will tend to point the nose toward the flight line.

That is particularly bad during take-offs with taildraggers from right to left.

Practice all you can,.............without being afraid of the wind; no matter what your clubmates may say.