Being a corporate photographer, portraits of guys in ties are a big part of my business. Being able to pull off a simple portrait in a short amount of time is very important. Executives have only have a short amount of time to give you and the faster you can get their portrait the happier they are.
You can see here my set up. I'm using a 43 inch folding convertible umbrella in the shoot through position. I'm using a single Nikon SB-800 with a Quantum Turbo SC battery. You will notice a second strobe in the background which I ended up turning off. My color balance was set to tungsten and the flash was fitted with a Full cut CTO to balance with that.
When I shoot portraits like this, I like to anchor my subject. What do I mean by anchor, well, most people feel very uncomfortable just standing for a photo. So I have them lean against a wall, place a hand on a chair or simply hold onto a pair of glasses or a pen. Have something to do seems to put them more at ease... or anchored. You can see the wall in the photo above. Wall work particularly well as they can also provide a bit of bounce. DT