Each has it's benefeits. I don't prefer my couch over my desk chair, or vice versa. However, I do think that FPS's are a bit better on PC than on consoles, it's just that my PC has trouble running some newer games, primarily lag in open areas. Not a whole lot of lag, but enough to be a minor annoyance (this was with Deus Ex: Human Revolution on it's default settings, which might be the highest settings, I don't know, I couldn't figure out how to change them, the in game setup window was really confusing)
However, for 3rd person action games, I couldn't see how I'd play it on PC. Take God of War (or Dante's Inferno, AKA God of War for Xbox focusing on a different epic poem about a different religion). I could not possibly see how a mouse and keyboard would fit to all the different buttons needed for the possible attacks and combos. Even moving around would be a pain. Consoles also have the benefeit of being pick up and play, where you don't HAVE to worry about all of the little technical things. I also like having a physical copy of the games I get, but that's not too big of an issue. Same reason I'd rather have paper books than eBooks.
Also, for the whole Splitscreen thing, I find it much more enjoyable to play in the same room with a friend than with someone over the internet, and because many people online (especially on consoes, but PC has quite a few as well) are complete assholes.
Of course, that's just my opinion. I'm sure this will remain to be a source of bitching for a long time to come, but what isn't on the internet? For whatever reason you give as to why you think this, there will be someone who will smack you hand and yell "NNOOO! YHEEUR RONG!!! THYS IS TE ONLI ANSUR THEAR IS!!!", and then someone will come along and smack that person's hands and say "NHEAU, STEWPED! IT'S ACKSHUALE-" someone smacks their hands, then another, then another...