I bought a home with hardwood floors in the half of the home. The flooring
was laid with the boards (2.25" x 3/4" T&G oak) running parallel to the
floor joists. I want to install hardwood throughout the rest of house, but I
am concerned about the flooring orientation. Aesthetically, it won't look
pleasing if I switch the board direction.

Is this something I should be concerned with, or should I just continue with
the flooring "as is".

Thanks,
Brad

PS- The current flooring is showing no signs of buckling or any signs of
movement. They are three years old.