It would be nice if I could choose what combination I wanted to use, instead of always having to use Ctrl-enter. Was there anything wrong with using tab a la Textmate?
Speaking of Textmate, I am curious why no Notepad++ plugin tried to support bundles instead of coming up with a new ad-hoc completion. Is there a technical limitation, eg because Textmate is on Mac?
Another improvement I have in mind: it would be awesome if QuickText had an option for autocomplete based off of words already present in the document. This autocomplete could be activated either automatically whenever the user types something (a la OpenOffice) or whenever the user hits a certain hotkey combination (eg Eclipse's ctrl-space after typing some characters) depending on the user's preference.