10-15 years ago (sheesh) I despised Counter Strike. Quake was king of multiplayer FPS gaming in my mind and you couldn't convince me otherwise. Even other id titles like RTCW were blasphemy.
Since then things have changed quiet a bit, with consoles taking over as the dominate force in online gaming.
I recently got CS:GO for $3.75 during a black Friday steam special... can't really pass up that deal. After playing it for a few days, I find myself as a veteran Quake junkie who despised the CS franchise now having respect for the game.
Both Quake and CS are, to my knowledge, the longest running competitive shooters. Who never really stopped having respectable titles (of course CS more so than Quake... DAMN you CS!) and I think that say something. When many games that these days have a very short life cycle, these titles still live on and have had an impact on virtually every multiplayer FPS since.
I can now look at Counter Strike as more of a old friend and counterpart rather than the enemy. Playing CS:GO is a nice mix of a classic shooter experience put in a more modern package. I find it way more enjoyable than playing another CoD title (I got sick of those after MW2... CoD4 was the best imo).
Long live the grandfathers of deathmatch (Quake) and tactical shooters(CS)!
Now if only Quake could get 100,000 daily players.