I have been playing TF since... well.. since Netquake 1.06 and Teamfortress 1.24. And thats a very long time.
I liked Q3F and played it up to 2003 a lot.
I liked ETF too but only played it once.
And the reason was: It simply didn't run reliable. Even when there where Downloadlinks everywhere it was a pain to install, update and even if you did everything right it never let me join any server. After lots of hours tempering around, looking for help in IRC, forum and so on I simply quit and decided to play BF42 while waiting for TF2 and some Urban Terror sometimes, then BF2 while waiting for TF2 and some Padmans World sometimes...
Urban Terror and Padmans World, while technically pretty close to ETF, have always been a piece of cake to play: Download a ZIP, unzip, double click exe, play.
In ETF I only managed once to join a server and play some japan garden. And it was a blast!!! Too bad it was my only experience with ETF.
