We have a sales/marketing guy that does this. It's clearly a learned/trained pattern of behaviour (maybe you can hide it better!). Nobody ever mentions it, and acts in a friendly manner. However, when he's not there pretty much everyone comments on how creepy it is and how patronised they feel.

Just something to consider - not saying that's the case with you, but this is a classic area where immediate or obvious reactions are often very different from inward feeling.