Being positive about beer is very important. When you start slagging off the beer people drink all you do it get their backs up, which does nothing to tempt them to try craft beer.
"Have you tried Galway Hooker? It's made in Roscommon by two blokes from Galway and it's absolutely lovely! You should give it a go." Edit appropriately for whatever beer you wish to enthuse about. No need to slag off the macros.