As far as Crew Goes Crazy episodes go, I remember Singularity being one of the better examples. At least better than the sex-focussed Fascination or Naked Now, though not quite matching the all-out paranoia of Dramatis Personae. There's just no beating Sisko's random-ass obsession with clocks.
Trip's "bag full of cats" line scores points with me on its own. I still bust that out in conversation now and then.