That's funny, I'm just the opposite, I've almost never latched the brake pedals!
On my kubota, its a lot harder to use the brakes independently because they are on the same side as the hst. I have to either use the cruise function so i can use my right foot for braking, or swing my left leg over which is what i do more often.
When stopping (although rare that I use my brakes to stop even though that sounds strange) I just have my foot in the middle of the two pedals, it's the same as having them linked.
I do link the brakes when I use the parking brake though.
I used to use the separate brake all the time for turning tightly until I got my current tractor. You can turn much faster with using the separate brakes. Also when one tire is slipping you can tap the brake on that tire to get the one with traction to turn.
In the snow it's helpful to use the brakes to help steer when your turning, or to keep you straight when you don't want to turn!
I love operating the 410 backhoe in tight quarters because it has the split brakes on the left (thank you Deere) and its amazing at how maneuverable that larger equipment is when using the brakes. Without split brakes-no way!