I've done both ways, you preserve flavor and slow the curing process by leaving the leaves on. The leaves wrap around the buds and protect it from air and trap all those juicy oils/terpenes for a fantastic flavorful frenzy. The trimming isn't as easy though I'll admit. But its worth it for terpene retention in my view. I noticed my nug smelled crazy when I would trim, its because those oils are being released and opened to the air. Now they go straight in the jar immediately after trimming to keep that smell! Everybody says my stuff is way smoother/better tasting now.
