One notion to address this would be to have a number of butler personae, from which one could select:
Ideas might include:
a) Friendly (Hey, CTP, how's it going? Just back from your coin run I see!)
b) Kvetchy (So you finally had time to return. After three days. No, no, I'm fine, thanks for NOT asking).
c) Punk/Goths (Oh. Hi. <drag of ciggie> 'Sup?)
d) Angry (I am totally out of gifts to give to YOUR visitors, and it's all your fault)
e) Stoot (I'm working on your packages, you'll get them soon.)
f) Tii (pbzzzt. Packages detected.)
g) Hipster (I would tell you about the 25 credits you could get from facebook, but that's so over.)
Oh well, I'm the only one who likes like my butler playing Jeeves to my Wooster. His madamsirs are said with such disdain. He knows he has the superior intellect. He's making fun of me and in no way needs assertiveness training