I loved the second time you see him, I remember a car smashing into the horse statue, thinking "oh bloody hell, not another Strider!" Seeing Dog run down the street and throw another car at some combine was such a huge relief.
Yeah i wish there was more of him actually, from looking at reviews i got the feeling the final streetwar sequence was a final run to the citadel with dog at your side
I have to agree, Dog is great fun, they did a good job with him, in the sense of making him endearing, considering he's practically mute and doesn't actually have a 'humanoid' face...the fact he's a total badass only makes him cooler!
I really hope he appears in any possible expansions, or even the next full-game.