The second part of that is easy - I think it has to be The Theory of Evolution (http://caz963.livejournal.com/51557.html).
It's a fic I'm quite pleased with, as I think it represents one of those "steps up" for me as a writer that I talked about further upthread. On the other hand, I did agonise about it and work on it a lot - and the reason is, I think, that it's one of those fics where I had to have Josh and Donna communicating without either saying what they meant or saying anything at all! And given the medium, that's very difficult! I mean how the hell do you write down what people don't say?!

As for the first question. Being completely honest, I've rarely had to do really major re-writes. And I know that sounds incredibly conceited, but I'm trying to just be honest. I'm sure coloneljack will correct me if I'm wrong, because she's beta'd practically everything I've written, but I think Number Eighteen (http://caz963.livejournal.com/127717.html) came out pretty much as I posted it, as did Changing Horizons (http://caz963.livejournal.com/143279.html) and some of the smaller fics like Syntactical Pedantry (http://caz963.livejournal.com/138491.html") and Carrying the Card (http://caz963.livejournal.com/113393.html). I think I changed two words in Flirting with Disaster (http://caz963.livejournal.com/100742.html) (which was a short, S60 dialogue fic). Oh, same with that daft WW/S60 crossover I wrote, Light Friday Nights (http://caz963.livejournal.com/93432.html).