TNG:O'Brien, Picard and Data
DS9:The Sisko! O'Brien, and Bashir
Hmmm, if we're going by series then...
DS9: Quark (I never get tired re-watching "the House of Quark" a zillion times!)
Voy: The Doctor
Ent: Shran. His quote to Soval "Lets drink! To our mutual DIS-satisfaction!" had me loling