Also, there are a few times in the DS version when he appraises female clothing, like the Magical Skirt, that brings out a few laughs. The way he appraises the Dream Blade and pretends to fall asleep is priceless!
Asking him to appraise horse manure will, unsurprisingly, annoy the crap out of him.
Torneko: Fer the love o' - What are y'at, stickin' that in me face!? 'Tis about as useful as a chocolate teapot. Now get up the yard with it!
On your quest for the Feverfew Seed, you enter a dungeon and run into Alena and her party of hired muscle, standing in front of a locked door. Alena has the key... but she takes a few steps back and just kicks it in anyway, apparently because she felt like it.