What are the pro's and con's of the different GUI interfaces

It looks like KDE & Gnome have the same functionality. What I am wondering is there any difference between those two, and fluxbox?

I have tried fluxbox aswell, and other then a different set up it accomplishes the same thing. fluxbox also brags about being 'lightweight'... so what is the negative, or downside to it compared to the standard KDE or Gnome GUI???

The reason I am asking is, I am considering having my laptop just have flux.

thanks for you input in advance.

The thing you are not seeing is that whatever GUI you are running, you are running all of the others as well, by using their libraries. if you use Fluxbox and try running Konqueror as Flux doesn't have a file browser of his own, that will take some time, despite Flux being lightweight. Or you want to run some gnome application and that will take some time as well, because it will have to use gnome libraries which are not as lightweight as FLux. SO in the end, it doesn't really matter which GUI you run if you are using all the applications that are required to get the job done. Just some cons to contradict the only pro I see for Flux and that being lightweight and fast. Here they are:

Flux doesn't have icons (or at least I haven't found a way to make them, or maybe my version was old)
Flux doesn't have a nice task bar, and I say nice, because in my oppinion it lacks some functionality.
There are more to go with, like always having to go to the menu with right click on the desktop. And that annoys me, when I have a window opened accross the whole screen and thus having to go somewhere out of that window to be able to right click to get to the menu.

In the end, it doesn't really matter what GUI you are using. Use the one you feel most comfortable with (if that is Flux, than Flux it be) and get familiar to it.

Putting icons on the desktop in fluxbox (personally I hate icons on the desktop so I dont use this)
http://fluxbox.sourceforge.net/fbdesk/

In terms of having to right click the desktop to access your menu, you can adjust your toolbar to be like 85% wide and have your windows NOT maxmize over it. That way, there is always a part of the desktop (right where that start button would be) that you can click on.

I agree, flux does lack some "functionality" that KDE and Gnome have, but again its not a desktop enviroment but a windowmanager. At any rate the majority of what I do is at the shell and I like to have a pretty background to stare at once in a while so I use fluxbox. Before I moved to moved to linux I was using a windows 2000 machine and before that was 3.1 and before that mac system 6/7 (so I was used to pretty simplistic looking gui's). The windows xp look makes me think candy_hell as does OSX. I tried KDE briefly but honestly it reminded me of candy_hell which was one reason I just tried out fluxbox. After using it now I can't go back. My suggestion is just try out a few WM and DEs until you find the one that you are the most comfortable with.

I like the Gnome interface of Fedora more than the KDE interface because it more user-friendly but when I work with SuSE I prefer the KDE interface.