What moments stand out most?

Killzone 2 at the beginning when the lads are preparing to leave the base. The facial animation and lip movements were the best I had seen outside an FMV...
Memorable moments:

SM2: dralthi?!
WC2: Shadow
SO2: nuke?!
WC3: best (acted) lines in WC ever:
We're headed to Kilrah with that thing, aren't we?
Well, what would you aim for if you had the biggest gun in the universe?
WCP: flying with Maverick