I bounce back and forth from Gnome to KDE very regularly; I'm not really the kind of person who views this as a religious argument. What's the point of having so much delicious choice in Linux if you don't take advantage? Over the years I've given lenghty tries to openbox, fluxbox, xfce4, and fvwm too. I honestly enjoy them all; they all have their strengths and weaknesses.
Right now I'm in Gnome country, and I'm starting to get tired of it. I'm rather excited about KDE 4. Apparently it will have new icons, which is great because Crystal makes my eyes bleed. And they have a new file manager Dolphin which is also great. There was very recently a news item explaining some of the motivation behind Dolphin and how it will differ from Konqueror (along with some tasty screenshots).
In my opinion, Konqueror is a great program except for the horrible clutter. It tries to do way too much. It tries to be an image previewer and isn't as good as a standalone program (feh?). Anything that opens PDFs inline quickly earns my undying hatred. A file manager also being a web browser strikes me as one of the most horrible ideas I can think of at the moment; I'd guess the only reason it was even considered in KDE is to copy what Windows does. Aside from being able to "browse" files and HTML pages both (in completely separate ways, note) the two tasks have nothing in common and should remain well separated, and happily the news item above agrees with me. On the other hand, I enjoy FTP support (and other remote file managing support) in Konq, because browsing remote files and browsing local files are exactly the same task; happily Dolphin will retain that feature.
Gnome is a nice environment, but Nautilus bugs the living crap out of me for whatever reason. Can't quite put my finger on it, but I detest trying to browse files in Nautilus to the point where I go out of my way to avoid it.