Of these following competitive games, which are the most difficult/has the highest skillcap? In what game does the top players impress you the most? What is your top 5?

Doom 1v1
Quakeworld 1v1
Quake 2 1v1
Quake Live 1v1
Quake 4 1v1
WarCraft 3
Brood War
StarCraft 2
Dota 2
League Of Legends
Call Of Duty