I was just wondering what everyone else prefers... Personally I do mine 4 levels deep because that's pretty much as deep as quotes'll ever go.
Edit: oops I submitted the poll halfway through adding option 5... Oh well, if you stack them deeper than that, just vote 4 and say so (so everyone doesn't just end up thinking that you voted 4 levels deep when you actually stack them 6 levels deep, or summat like that... ).
How deep do you stack your quotes? 12 votes
2 levels deep