What brand of spark plugs have you had luck with

Yup worked at Chrysler for 17 years only ever used champion , work at an independent shop now use Ngk will not use ac delco ,or autolights , iridium plugs do not like old engines the need to be warmed up and driven , coustomer with a bmw had his car put away for the winter was starting it every so often fouled 6/10 plugs my 2cents