I have a similar one to yours that creates a new plain text document from text on the clipboard.
My most often used one is Open current safari tab in chrome. I prefer using safari as I seem to get the best battery life using it. I don't have flash installed so any page that may have a flash component just gets opened in chrome using that Alfred workflow.
I occasionally need to open links in Firefox (rather than Chrome) so I have a FF <url> workflow that simply opens that link in Firefox. I need to automate more of my workflows.
The one I use the most, by far, is "Plain Text Paste," which I use almost every time I paste anything (I use the hotkey CMD-SHIFT-V). It's here: http://cachefly.alfredapp.com/beta/Plain%20Text%20Paste.alfr...
The only other workflows I use regularly are hotkeys to open websites I visit regularly, like our own website and our WordPress log-in control panel.
I'd too would love to hear which workflows other HN readers use a lot.