Each room can be individualized-
but if i was to add trim to my living and kitchen-because it is a continuous large room and open (there is no doorway or frame between the two to seperate the room) i would do that trim in the same color/stain. But if I was to do trim in my bedroom and my kitchen-they are seperate entities and treated like such. Unless you have the same decor thruout your whole house, which is highly unlikely so I would stick with the color or stain that matches the decor in that particualr room.
But like the previous person said-if you plan on selling it keep the color uniform thruout and a very basic color...whites/offwhites/stains. Since many people have different furniture and colors, you do not know what the next owner will have. But if you plan on living there forever or a long time then I would go with a basic color that you really like-but do not go with a "fad" color-like a yellow car
, becuase if you change your decor the next season then it will not go and you will have to go thru all that work again to repaint/restain to the color of your new decor.