I played about half (maybe) of GoW1 on a friend's PS2 and it pretty much eliminated the hatred I had for the PS controller, so I had to get my hands on CoO when I got my PSP, and I don't regret it.
I'm playing through it the third time (with the 3rd costume. no spoiler

) and I'm still lovin it.
Top-notch music. Orchestral is the shit for these mythological games, dunno why you'd want modern (heavy rock?) music in it. Anyone remember Prince of Persia WW when he went all emo and the soundtrack was constant grating guitar?
I still don't know how people complete this in 5 hours... I just arrived at Hades in 4 hours, playing on God mode. Probably cause I die constantly trying to milk the most red orbs as possible (150+ hits

)