I often PM particular Jellies who I know have some good, specific knowlege about a particular subject and a helpful way about imparting that knowlege to other Jellies who need some advice, especially when I feel that I can’t help the troubled jelly any more than I already have.
Also, I have PM’d certain jellies when I have found something funny or interesting to share with them on a subject that we have in common, or a subject that came to my attention when I was reading one of their posts.
I’ve asked certain jellies to help me out on a number of occasions and I’ve been very grateful for their assistance.
When I first came onto Fluther, a couple of kind jellies helped me, a relatively computer illiterate nooby, on how to properly use the linking device. I thank them for that, because some of my posts are very free flowing with the links.
And sometimes I will PM a Jelly just to let them know that something they posted really moved me and I wanted to tell them that personally, in more detail, and more gushiness than I would want to do on a public post.