Bookmarking/favoriting feature for nodes

When ones has many custom nodes, it's pretty tedious to keep searching for the right one each time. When using search-to-add, this is often due to having nodes with redundant names and functions, as well as different names than their "display" name.

It would be great to have a folder at the top of the other node categories called "favorites" that could be added to via right click. Or even "most used."