It's the one you've been drinking for quite awhile and you never get tired of it. One you drink fairly frequently and you don't loose interest each time. Mine is the one I started out with being my beer of choice back in the early '70's. PBR! My AAL of choice back then and to this day I still enjoy it. Even though I am big into craft these days I still enjoy my old standby. Maybe it's that 1st beer love you never forget? Could be. Craft wise it is Kane (NJ) Head High. I never get tired of that world class IPA. Well think I'll crack open a 16oz PBR right now. Yours long time beer?