You have a Facebook PAGE for your business, right? Not a profile; please not a profile.
If you are a Facebook page administrator, and want to leave a comment on a post on your page’s wall, the only way you can post as YOU and not as the page, is to change a setting on the page.
Select, Use Facebook as Page, Go to Edit Page, choose Your Settings and deselect the option to always comment as the page. Note: you will have to be using Facebook as yourself (and not the page) to comment as yourself.
There you go — that’s it — now you are free to interact on your business’s page as yourself and not a company or brand.