Make sure that the person you choose will give you just what you want.
Never settle for less.
If you want more personalized vows, sit down and talk to them about it.
Tell them your favorite memory with each other. Where you met. How long you have known one another. Anything that might make it that much more special. Make sure you are not surprised on your wedding day with words that don't mean a lot to you. Make that day, every part of that day, your own. Add a bit of clean humor in. Include those little things that describe you as a couple.
There is nothing wrong with tradition but never be afraid to be who you are on one of the most important days in your life.