I completely agree that you learn all sorts of unexpected things doing a PhD that are often unrelated to the specific field you're working in. Lots of these things seem to be common across the experience of many people, but some of them while be uniquely yours.

But lots of what you'll have to do won't be cool or new, it will be tedious and time-consuming drudgery. Of course, it still might be worth it, but don't expect it to be all sunshine and light.