Can someone explain to me what's so great about witches?

If you're not into the magic itself, a Witch/Magic GP would more than likely come with some cool Medieval and Renaissance themed clothing, hair styles, and furniture to play with. More than likely a few Hippie/New-Age and Gypsy themed things too, like crystals, incense burners, beaded door curtains, and so-on. And, of course, men's robes for you Teenaged wannabe warlock going through his Goth phase...