Okay, I see what you're saying. Yeah, Halo was very accessible to the console gamers, hence it's popularity. There's a lot more to compete with out there on PC. Still, Halo has a certain charm to it... the way the names of the levels come up, the interaction with the Marines ("Purple Hearts for everyone!"), etc. It might not have been hailed as highly as, say Half-Life, but I'm sure it would still have gathered a fanbase.
Anyway, since I finished Halo, I need something to play until KOTOR II. I might pick up Killzone, or NFSU2.
Can't go wrong either way...or wait till MGS3.
I haven't played my Halo 2 much...just purchased an HDTV so am waiting to play it on that.
On the last level of Killzone for me...fine ride it's been so far.