Porcelain is unique among clay bodies. The lack of plasticity, almost a rubberiness, is terribly appealing once you get used to it. I would rather throw porcelain than stoneware any day, and actually find it easier to throw now. It was a difficult transition, though. I was a good stoneware thrower, but porcelain kicked my butt at first. I switched to porcelain because I wanted the whiteness, but it took me months and months to get used to it. I had to let it dry out until it was really stiff in order to successfully use it. I've been working with it for about 13 years now, so I've figured out what I can and can't do with it. I no longer worry about water- I drench it but work quickly. I don't baby the drying at all- after it's trimmed I just leave it out to dry. I find that drying speed after trimming is a non-issue if you make the walls even. I take a little more care from wet to leather hard, though, as the lip will dry very quickly. It's difficult to get things dry enough to trim in one day like I can do with stoneware. I also don't baby the firings at all. I often bisque my pieces on 'Fast Glaze', which is a 4.5 hour firing. Anything under 4 pounds can handle the fast firing just fine. I prefer to pull handles right on the pot, but I can't do it with porcelain. Instead, I pull them on a bisqued piece, then let it stiffen up and transfer it to the real pot. Once they're attached I can put them in the kiln and dry them out quickly if needed.
My students often ask me if they're 'ready' for porcelain, because they feel like they have to use it, like they're expected to 'move up' from stoneware. This attitude goes for moving from brown or buff stoneware to smooth white stoneware, too. I'm all for trying different clay bodies for the sake of expanding one's experience, but I stress to them that there's nothing wrong with using the groggy brown clay. It's all good stuff, just different.