I have always been a straightforward full KDE DT user until I started playing around with lightweight versions for a friend whose HP Pavilion is starting to show its age and needs something a bit easier on resources.
Same for myself, as well - except my search for 'alternative' environments is founded upon different reasons: there is a background disk write problem with some desktop environments, and also, the demise of KDE3.
I must say I am getting rather confused at the number of variants - Minime, openbox, e17, xfce, lxde, fluxbox blah blah blah. I am not at all sure what the differences are as such. I will hunt around in google for the next few days but it would be useful if there was a straightforward RECENT comparison of them all.
May I suggest you to do as I did recently, and simply evaluate them directly? That is one of the greatest features of PCLinuxOS - one is able to install a wide range of different desktop environments so easily, and then compare them directly.
"Minime", on the other hand, is a PCLinuxOS term - it is used to describe releases which contain fewer packages by default than the "full" releases do, thus allowing for a greater range of user choice (as it is generally easier to install any required packages than it is to remove undesired ones.).
I am far from convinced, as there seem to be some significant weaknesses - at least OOB. For example, no way to browse samba shares, CDs/DVDs not detected and mounted, just for starters. Lightweight is good but not at the expense of basic functionality, surely?
The functionality is there; however, it is usually present in forms that you may not be immediately aware of or used to. Best to keep an open mind, it seems - and of course, search through and make good use of this forum.
It reminds me of the popular misperception that linux is "no good for gaming". That particular notion is probably best countered not only by the assortment of functional (and fairly challenging) games that are already available for linux, but also by the fact that with linux, the computer
is the game.