Well, recently I was searching for text editor more functional than simple Notepad++, as my .txt docs constantly grow up and working with large plain text files becomes not funny.
So I tried OpenOffice, also some RTF-based editors (the wordpad.exe taken from Windows XP was not too bad, unlike one from W7+), also Notepad++ itself with some extensions, and several others like Ultraedit and HTML WSYIWG-editors.
But they all having serious cons — too heavy/too complex to be used quickly for everything, lacking of "spoiler"-like tags, too bloated/closed formats used to store files, or just not handy.
Then I went smoking and had one interesting thought — to try PB IDE for that :3
And I should say it turned to damn good idea — the IDE is very fast/minimalistic and it gives necessary level of text/color formatting, even allowing cross-document clickable links powered by Includefile! And surely other features based on PB things — custom keywords to highlight, nice lines folding, etc. All this generally allows to work handy with large text files.
The only things are not too good is slightly worst comparing to N++ find/replace system, and the fact that local language is not supported by IDE as well as english (selected word highlighting won't work with non-latin chars — that's main inconvenience). Also need to store files with one of PB extensions to have "powerful formatting" support.
So if you doing something with docs (not code only), you might give a try to PB IDE also

PS. Maybe there will be other cons, but for now I don't see any reason to use some complex "office" soft, instead of this way
PSS. Should post this in off-topic but realized too late, it's time to go and get some sleep ^^
