Here are some of the reasons why PC gaming is far better than consoles:
Consoles play games with 20-30fps and PC with 60+ fps.
Consoles have 1280×720 and even sometimes sub hd resolutions but PC have 1920x1200 and 2560x1600.
Also PC have better graphics(lighting, textures, shaders etc).
Consoles don’t have Anti-aliasing and Anisotropic filtering.
With the consoles you cannot mod the game.
Console gamers struggling with the controller in fps games.
With Consoles in multiplayer you had to always mute everybody to avoid whiny kiddy voices talking "gangsta".
Also with Consoles you cannot play multiplayer with more than 16 players but with pc you can play with 50+ players. With PC you have dedicated server but consoles don’t have, so consoles use peer-to-peer only and that is very bad because if someone lags then everybody lags.
There are tons of exclusives on PC gaming like starcraft 2, diablo 3, stalker, Crysis, the Witcher, Empire Total War etc too many too count.
If you like RTS and MMORPGS then PC is your only choice.