Mine are really boring, all text. But I'm just calling my series of beers "Nerd Girl Ale" and giving them number designations. So something blocky and computer-formatted-looking seems appropriate.
I used Inkscape to make the initial "NGA" logo, then assemble my basic labels in GIMP. Turn that into a PNG, paste a page-full into LibreOffice Impress, and export it as PDF for printing. There's probably a better way of doing it, but I'm lazy and using Linux. For my quick-and-dirty labels, it works great.