I’ve been replaying Portal 2, and there are more opportunities in the early levels to get a look at Chell than I’d thought.  So here’s one:

Looks like she even found some lipstick

She really does look much less stressed-out than in Portal.  Maybe GLaDOS is right and she really does love testing.

(I wish they’d let you look down and see her, as you can do in Left 4 Dead or Mirror’s Edge.  I was replaying the latter last night too; I don’t think any other game I’ve played gives you the same visceral feeling of being inside that (hot) body.  The screen sways with your steps, blurs with your movement, you hear the panting of fast running, slaps of feet as you jump or wall-run, grunts as you slam into things.)