One thing I wish Notepad++ could do is to create a table document instead of the regular text document. Kind of like excel. It doesn't have to have any fancy formulas or anything like that, simply a grid with writeable cells.

I love how lightweight it is and I like collecting notes in it. Data is better in a table rather than a text document though.

I haven't checked recently whether such a thing might exist, but last time I checked I couldn't find anything like it. I have no idea how easy or hard something like this would be to add. Then again, perhaps it's better without it.