I love the parameter hints with the auto completion feature. Use it especially now that I figured out how to teach Notepad++ my OWN functions from my own library/framework.
However I noticed that the little message (the hint), that tells you what the return value and the parameters are, disappears very easily. On backspace for example. So whenever I make a typo, the parameter hint disappears... Even if I wasn't done yet.
Best way to solve it would probably to make a custom setting that says "only hide parameter hints when X is pressed" and then the user can specify their own button. Several could make sense: [;] or [enter] or [)] or [arrow down].
otherwise maybe make it so that it at least doesn't disappear on backspace?
or allow to specify a button, or a right click context menu, that shows the parameter hints on request rather than only on input?
Either of those implementations would make Notepad++ rock even more!!