Growing bulbs from seed greatly reduces the cost per bulb and means you also have a lot more to play with. You will get a good selection of forms often showing considerable variation which I find highly desirable. Many bought bulbs are often clonal and usually represent a form that multiplies itself freely; this can sometimes be at the expense of flowering. Plants that concentrate their efforts on vegetative multiplication do not always spare the energy for flowers. It also gives you the opportunity to select your own favourite forms that you can multiply clonally if you wish; it is nice to have a pot full of bulbs that are just that bit different from everyone else's and, if you enjoy showing, it might just take the judge's eye. I also like to see a pot of bulbs showing the variation in a species, and providing this is not too extreme, I find it more interesting than a pot full of a single clone.