on CSS you don't see a game you see a simple mechanic of point and click in which there is no such thing as a noob, anyone can click on someone else.Yes, everyone IS differen't but on Counter-Strike: Source you don't see noobs killing the pro's, because of tactics that the pro's have evolved over a seriously long amount of time and it's the same with every game. With an exeption of SSBB.
If you want to choose between WoW and guild wars then as a person who has played both listen up, Guildwars has more realistic Graphics and a story driven plot however the gameplay is almost exactly the same as WoW, WoW charges monthly but because of this they have more money to play with when it comes to designing new content and features, WoW also doesn't focus on a single story when you are leveling a char you will find that you encounter multipul storys all driven by the games lore, it has slightly cartoony grapics enkeeping with the grapical style of WC3, as for players you will find that most of the players on GW don't like other players whereas on WoW the players generaly are willing to play with others.