More hosts / subnet and less subnets, or less hosts per subnet and more subnets?

So I just learned about classful networks. Class A, B, C. Class A has very few subnets, but apparently has a ton of hosts per subnet. On the opposite end of the spectrum, Class C has a ton of subnet but not that many hosts per subnet.

What are the differences? In Enterprise networking, for instance, which one is more preferable?