Creating new planes for all/most sketches may be good form, but is usually unnecessary in most of the work I do. Often times, I want to change the sketch plane to make use an assembly more convenient. Copy the sketch from one plane to another may work but seems like a potentially messy work-around, especially if other geometry built up from an extrusion of the moved sketch fail.
IAC, BigSeb says it is already on the suggestion list, so that's good. Is that list located somewhere public and can users vote up the suggestion?