I use regex a lot while I'm programming.
I use them in code if I'm parsing data.
I use EditPad Pro as a text editor, not an IDE just a scratch area and a place to use regex. I also use RegexBuddy as a GREP tool. Both of these programs cost money, and there are free alternatives to both, but it's just what I like. Not paid by the folks at Just Great Software, just like their stuff.
> why are you editing blu-ray rips with a text editor, look please just stop
Some dumb apps don't split flies up into manageable slices. On windows, I prefer EditPad ( Lite / Pro )to Notepad++ any day of the week. I haven't done the xGB file test in a while but I recall Editpad handling those like a champ and the multiline search UI is very helpful.