Proper Yeast
I've gotten into the habit of relying on Safale US05 to ferment several of the ales I like to have on tap at all times. This is a work horse of a yeast that attenuates in the low 80 percentile with a clean profile (minimal phenol and ester by products) and performs well in temperatures in the low 60's f. I normally use it for several of my pale ale recipes, along with my India pale ale, imperial pale ale and American brown. Having said that, though I'm not real strict about this, I think it is important to use the proper yeast for the style of beer you're brewing. As homebrewers we now have available to us a multitude of yeast strains that are specific for the numerous commercial beer styles. Using the proper yeast is important if you want to call the beer 'to style'. If you use US05 for you're German hefeweizen it won't taste like a hefeweizen but will fall into the american hefeweizen catagory which is fine but shouldn't be considered or refered ...