Medium format covers quite a range of camera styles, all capable of landscape. Honestly, geared heads and such I prefer when using a tech cam, or something else that is generally pointed straight ahead and benefits from small adjustments. (not to say other cameras dont) If I am using an SLR style camera (Hasselblad H body for example) I greatly prefer a ballhead. At least when I do landscape photography, I am always hunting for little details to go with the landscapes which involves me getting the camera to some odd angles. I find the ballheads are quicker and more flexible in this regard. Again, this is just based on my style of working.
I also generally have a nodal slide and panoramic clamp of some sort attached to my setup. That way I can turn the camera level after locking down the ballhead. It also allows me to actually center the weight over the tripod. (yes, and I can make panos too)
I prefer the RRS BH-55 and their pano gear personally.