I also work for a bank, but on the servicing side, so I don't see our external customers directly.

That said, I work extensively with folks from temp's all the way to EVP's, and, by an large, everyone likes it.

The ones who don't, tend to not like things out of there perception of normal. So, if your customer base is such, this can be an issue. If not, and if indeed they are coming in fearful of corporate things, then a kilt is the perfect way to go.