I correspond weekly with a work colleague from the 1990s who I introduced to the joy of Selectrics. 
I've also written complaint letters to my state attorney general's office of consumer affairs when I've been the target of illegal business practices. I've gotten prompt, positive responses.
On rare occasions I write letters to other old friends, but they never write back.

Javi wrote:

... he just wrote for the pleasure of writing and as a means to share his thoughts with someone else (in this case, a blank paper)

I have found blank pieces of paper remarkably insightful. They are the perfect listener, and if the paper does not understand something you wrote or feels that you could have written it better will just stare at you blankly until you find a better way of expressing yourself.

Now I do more or less the same, and both my stories and the thoughts off the top of my head are a match made in heaven for the pleasure of typing.

I have no story in me - that faculty is dormant or undeveloped - but I do have quite a lot of things coming off the top of my head and even if my head is quiescent at the moment I find that if I force the issue and continue writing that something will eventually pop up I could not have anticipated. That would be the definition of a bore in conversation, that he just kept talking even when he had nothing to say because he wanted to be there when he did, but paper is very patient and does not mind.

I am one poor correspondent but I try from time to time.

Fleetwing wrote:

Personal correspondence, including thank you letters. People seem to really get a kick out of getting a typewritten letter. I also just sit down at a machine (whichever one happens to be at hand) and sometimes just type a stream of consciousness piece -- to exercise the machine and my fingers, as well as to offer commentary for my own benefit. Purely ephemeral, and not worth sharing with anyone else.

I don't have any sort of urge to write creatively -- no novel in me (or even a short story).

We are on the same page there - maybe it's like being able to smell isovaleric acid: genetically hard-wired, you either can or you can't. Non-story writers of the world unite! 

In terms of ephemeral and not worth sharing and etc., I've been doing a lot of stream of consciousness stuff recently mainly to force myself to type and to write, something, anything. I found the key to elevating it one small step beyond ephemerality into something which might metamorphose into something worth sharing in the future was to punch holes in the stuff, number the pages and put them in loose-leaf binders - a retrospectively obvious but prospectively mysterious idea which I owe to Typewriter Talkerian JoeV. 

Insights will pop up in the stream of mine tailings and this way you might just go back and cull them out rather than dumping the whole into some nearby pristine wilderness river.

I've written mostly letters of late.  I am working on a book of short but amusing stories.  Some of which I've sprinkled here and there on this Forum.