I was lucky as a left handed child. My parents never forced me to conform and were adamant that all the many schools I went to should allow me to choose. I've never had a problem with right handed implements except for the current toilet brush which unwinds itself and falls off the handle if I use it leftie.
I think the idea that lefties are more creative comes from the right brain controlling the left side of the body and vice versa. Brain scans carried out while people complete various tasks show more areas of the right brain firing during creative activities e.g. music, art and (weirdly) maths. The left brain controls more analytical activities. However, we all use both sides of the brain to a greater or lesser extent. I'm left handed (right brain) but my dominant learning style is analytical (left brain) and I'm also quite creative.
To find out which side of your brain is dominant try this:
Hold your hands out at eye level, arms fully extended and make a triangle by joining tips of your index fingers and your thumbs. Find something smallish to look at through this triangle (e.g. clock, photo, lamp) with both eyes open and the object in the centre. Now close your right eye. If the object is still in sight, your left eye is dominant and this usually means you are predominantly right brained. If the object jumps across, often disappearing, your right eye is dominant and you are predominantly left brained. Open your right eye and close the left to check. This won't work if you're cross-eyed! It works perfectly well if you wear lenses or glasses.