TDE is not really for the nostalgic of KDE3,
but made for those who want a light desktop,
and nevertheless, with many rich options.
I succeeded to keep KDE3 a long time,
after, TDE was for me an excellent news.
KDE (after v.3) is heavy and has not so many options.
TDE is much better !
and much better than these desktop :
GNOME3
Unity (GNOME3, défaut Ubuntu)
Cinnamon (GNOME3, défaut Linux Mint)
Mate (GNOME)
LXDE
Xfce
Enlightenment
Environnement Qt
...
Best regards,
André