Are all human brains “folded” the same way? Or do I have a “brain print” unique as my fingerprint?
Not after they roll on the ink, you don’t.
It’s different like a fingerprint but there are standard, similar ‘folds’ that all normal people have.
And new folds can be created. If you start learning music at a young age, you’ll get a new fold at the front of your brain. See neuroplasticity.
The peaks are gyri (singular: gyrus) and the troughs are sulci (sing: sulcus) or fissures, depending on size. There may be certain morphological differences between individuals, particularly if they have brain disorders like Alzheimer’s or schizophrenia. Otherwise, they are pretty similar, and the big features can be used as “landmarks” to locate areas, e.g. calcarine fissure.
There is (or was) a display in the Psychology Deartment of Cornell University with a number of different human brains preserved in jars. They look remarkably different from one another. As kaltkalt and thelurkinghorror say, the general layout is the same, but the details can differ quite a lot, and the sizes of particular gyri and sulci can vary quite a bit from one person to another (without any very obvious effects on their mental traits and capacities), but if this affects actual brain function, the effects are generally not very obvious. Functionally defined areas can vary quite a lot in size too, from one person to another. For instance, some people seem to have a primary visual cortex (aka V1 or area 17) that is about 2.5 times as large as that of others. AFAIK, however, this is not correlated with any very obvious differences in their ability to see.