To Leave or Not to leave, certainly is a good question. A well trim bud looks great in a bag for sale and a bud with its' sugar leaves looks nice and frosty in my cure jar. When you trim all the sugar leaves of your bud you are exposing all of your resin crystals to hazards of handling. The sugar leaves are there to help protect your bud and the resin on it. I understand the bag appeal part, if you are selling it, trim away. If you are keeping it for yourself or close friends keep the sugar leaves on to protect your bud until it is ready to smoke.
Here is a little project for those willing to partake. Trim a few buds up nice and close place them in your cure jar, then take an equal amount of bud with their sugar leaves intact in another cure jar. When the cure is over and you are ready to sample your prize buds, check out the amount of crystals attached to the jars. I think you will find you have much more resin stuck to the jar that contains your nice pretty trimmed buds.
Happy Growing