The new CS:S is so much more advanced than old school CS. I'm 23 (on Wednesday anyhow) and have been playing since I was 16, so I was around for all the beta shit too.
TFC is also my favorite, even over CS:S but I don't play it anymore. I don't have the old Half Life loaded anymore on my computer. I'm waiting for TFC for CS:S to come out...that looks awesome.
If anyone is interested in playing on the Deathmatch server I play on, here is the info on it:
Deathmatch USA =CS:S DM= MOD
IP: 208.167.224.187:27015
My ping is usually very good there. It's a 20 person server with bots if theres less than 10. And to clarify from before, once you join the game you'll have to pick a team (terrorist or CT...like normal) From there, you'll instantly spawn somewhere and have 3 options pop up. You pick your optinos with the number keys on the top of your keyboard. You make your selection of new weapons (pick pistols first, then you go to the other guns menu) After you die you'll be given the same menu. The 3rd option is to always respawn with the weapons you last had. Once you do that you won't get the menu anymore, but you'll respawn with the weapons you chose. If you want to reenable the menu to pick new ones, during the game type "guns" and it'll come up right then. You can only change once every life, FYI.