In summary, I tried KDE4, but didn't feel comfortable either. Finally I ended up in GNOME3 fallback mode, whose default theme is disappointing as well. I found this theme which makes it look friendlier http://gnome-look.org/content/show.php?content=145210 , but had some problems in nautilus and background font color. So I modified it and uploaded it here.
Now my desktop reminds me of Gnome2 and sometimes I believe it is even friendlier and better looking ;)