Looking at a Crysis, well CryEngine, character - one place to start is the awesome Dominance War competition. I am keen to see if machinima using something like the CryEngine can deliver something of a performance for my main project in 2010. Well, this model by Faraz Mobin certainly spawns plenty of inspiration to give it all a try. The render here is using the CryEngine2, which clearly does a fab job. See more of his model via his forum posts or the DW4 gallery.
[DW4 entry by Faraz Mobin, rendered in CryEngine 2 via CGSociety]
Also the animation inside the engine can do things like this:
[CryEngine 2 facial animation, this pic via GameSpot]