I'm tempted by the Shenlong pan, which is glorious ... "if you only owned one mecha cel" ... yep, right on.
But I'll go with the chilling Kenshin OVA cel:
http://ralphvboy.rubberslug.com/gallery ... mID=117545
The evident care with which you've displayed this, with a fine context description and a near perfect replacement bg, make this a real highlight of your fine gallery.
Edit: Um ... anyone want to make a third endorsement of this cel?
Well ... I get another pick, ne?
Ok, let's stick with Kenshin:
http://shelliesgallery.rubberslug.com/g ... mID=115874
That's a lovely, moody portrait ... eyes, scar, sword, wall ... everything in just the right spot.