If that's the way you've trained yourself... OK, but its an unusual setup.

The reason behind having you pull for up and push for down is partly from the desire to simulate the setup in a full scale aircraft. The full scale has the stick set so the pilot pulls back to raise the nose. (OLD saying: Pull the plane's nose toward the pilot's nose and up it goes.)

There's actually no problem with you making any control assignments/reversals you want. If it works for you... its fine.

Any other person attempting to fly the model would be cnfused unless the controls were put back to a normal mode.