It's your house- why not? If you prefer a different casing, go for it.
Renee

Several years ago we swapped out a slider for a french door. We went different and matched the wood color of the custom wood valances. The door casing was left the original dark dark tone. Last summer we had all the windows in the house replaced. We decided to go with the french door color, leaving all the casings dark. The idea being some day we may get the energy to swap out the casings..but maybe not as these things tend to go. The difference does not bother me in the least. It lightens the rooms which we needed. It is curious to watch the "decorating" shows. They are all about switching the light fixtures to be individual to the room, a decorating choice...but on a recent show comparing home worth before and after renovations the decorator and realtor were put off by the lighting not all coming from the same cookie cutter family, room to room. I would think your doors would be a similar deal, a decorating/design element on the one hand and yet..should they all be the SAME on the other.

Can you ever see all the doors from the same perspective? It would make a difference for me.