Jorun, you are not alone as I don't really like them either. We do possess one plant with variegated leaves, a Hibiscus rosa-sinensis 'Cooperi'. I cannot now remember where we got it from, or why. On the plus side it does have a very delicate bright red flower, but against that it has a tendency to attempt to revert to the more natural green and these need to be clipped out when they appear.