To expand on a couple of things previously said:
mike_d wrote in post #16593029
For stills, yes. Ballheads make it easy to position the camera with one hand, then lock it down with the other....
If you purchase a decent quality ball head with proper tension control (this is where the Manfrottos fall well short), you don't even need two hands. Set up the camera on the ball head, adjust tension control so that it holds the camera when you're not actively moving it. From there, you just position the camera and let go; ball holds camera in place. This was the biggest relief and revelation of ball heads for me when I finally moved over to a non-Manfrotto piece.
Somebloke wrote in post #16593172
I know this has been done to death but do you really need to go the expensive arca Swiss style root? Are the manfrotto heads sufficient?
Because the Manfrottos don't do tension control well, you have to loosen the tension knob, move the head where you want it, and while holding the camera in place, dial the tension knob back on. Because of this, there is a real problem with 'drooping', where the camera drops slightly while putting that tension back on.
This problem is eliminated by using a decent quality, Arca-Swiss style ball head (many of the ones already listed within this thread). Also, the A-S system is much more, widely supported in terms of accessories available, etc. Especially when/if you get up into the "big glass"; things like Gimbal heads are only made in A-S compatible models, so you'd be SOL if you're still on a Manfrotto system by that point.
Manfrotto makes some alright stuff that will get folks in at a price point that rivals the cheap-crap stuff you get from Walmart/Target/Best Buy/etc; but the A-S options simply have a wider range of better quality stuff and better support.