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human
[LoTR] So other than control and curse the wielders after the One Ring was forged what did the other "Rings of Power" actually do?

Did they provide any benefit to the people who acquired them before Sauron took control? and why was it only the rings given to Man that seemed to have a lasting effect?
gpt
>Did they provide any benefit to the people who acquired them before Sauron took control?

Yes.  The main purpose of the Rings was preservation.  The Elves' goal was to stop the changing of their kingdoms from time. This is why Lorien and Rivendell are like a window into the Eldar Days during the Third Age, Elrond and Galadriel use their Rings to preserve the kingdoms. The elven kingdoms would have been even more magnificent when they had all 19. 

>and why was it only the rings given to Man that seemed to have a lasting effect?

As described above, that isn't exactly true, both Elrond, Galadriel, and Gandalf used the Three throughout the Third Age.  But the Nine given to Men provided them with a sort extended life.  Their Rings (along with the 7 given to Dwarves after Sauron took the Rings from the Elves) are inherently corrupt as Sauron directly helped make them (this is not the case with the Three).  Just as Frodo and Bilbo did not Age (or did never slowly) the same happened to the Men who had the Nine. Dwarves proved resistant to the Sauron's control, though not totally so from the Rings' inherent corruption.


All the Great Rings generally enhance their bearers as well.  The more powerful the bearer, the more power enhance by the Rings.  ^(This is not why hobbits become invisible!)  From the perspectives we see, Frodo and Bilbo have enhanced senses, and ability to read people, though not full on telepathy (though that may have been possible for them if they trained themselves to the task).  Someone like Gandalf or Galadriel are no doubt enhanced in other ways (likely strength of mind/will), though we don't really see explicitly how.