After years of stubborn refusal to give up Ubuntu 10.10, I finally moved to OpenSUSE 12.2 (which uses KDE 4.8). Setting aside the Yast related rants (which have some substance), I couldn't be happier and the credit goes to KDE.
Even though some simple things are still hard to do (you still need to go through few hoops to get a custom application launcher added to taskbar), I haven't yet found something which can't be managed with either straightforward GUI configuration or with scripts. Things I like:
1. I have a sane & traditional icons+multiple taskbar+desktop setup
2. I get to choose how many windows I can see at a given time and what size they are (KDE also remembers the size)
3. Dolphin retains Split/compact/tree view and infact does it with all the customizations I could ask for based on what I need regularly.
4. Dual displays took exactly 2 minutes to setup - all driven by GUI. It even has the audacity to offer me separate wallpapers for each display without actually going through any kludges. Depending on which desktop I right-click and choose "Desktop settings", it allows me to set background etc. for that display.
5. I can choose the sort order and grouping of the applications on the taskbar - I like them unsorted (i.e. the order in which they were launched) and ungrouped (until there are too many and need to be grouped) - all this was configurable in "Task Manager settings".
6. I get to choose my own Terminal Emulator and I'm absolutely happy with Konsole because it even lets me customize the shortcut keys to manage tabs.
I could go on (and I never thought I would about KDE; I've always considered the simplicity of Gnome 2 superior to KDE) but KDE 4.8 is a fantastic experience for a Linux power user.