I prefer using bourbon as it has a sweeter, softer flavor (Woodford Double Oaked is my personal favorite). Rye gives the drink a more spicy, woody flavor.u003cbr/u003eFeel free to choose whatever you like best. If you're uncertain, this u003ca href=u0022https://whiskeywatch.com/whiskey-mixology/best-bourbon-brands-for-old-fashioned/u0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eblog postu003c/au003e by Whiskey Watch is informative and helpful. Because this is a mixed drink, diluted with other ingredients and served over ice, don't use the priciest bottle you have. Save that for sipping neat. However, it's still pretty straightforward with not a lot of mixers, so choose something mid-range.