I have corresponded at length with composers who seemed to appreciate the interest. On the other hand, I know a composer (not even that famous, just successful

I have corresponded at length with composers who seemed to appreciate the interest. On the other hand, I know a composer (not even that famous, just successful enough) who has his copyist answer all correspondence with stock replies, since fans don't do anything for him and just annoy him; they aren't part of the ecosystem of commissioning works that is how he gets paid.