It is probably just me but that vortex always looks like it sticks out a little, like a 3-D effect. Nice picture though.
BTW: There is a nice image of the Kliuchevskoi Volcano taken from the ISS on the wallpaper link above. Looks quite nice on my desktops.
The JPL caption released with the image:
The sunlit edge of Titan’s south polar vortex stands out distinctly against the darkness of the moon’s unilluminated hazy atmosphere. The Cassini spacecraft images of the vortex led scientists to conclude that its clouds form at a much higher altitude — where sunlight can still reach — than the surrounding haze.