For me its the smell of a nice indica plant. I never get tired of that smell. Addictive? Yes.
I like the first cut and bud trimming session the best, to see what the results were for the year. My brother and I cut and trimmed up one huge 10 foot landrace sativa lady last night. We got some monster buds. Now trimming will be more of a chore as we cut the rest of the plants/buds. He already had the indica curing in jars, so we smoked that of course.
of course, a skunky indica plant is always a pleasure to put your nose up to and take a big whiff the first cut is always an epic moment! it's a beautiful timber haha. and damn! 10ft! that must have been crazy! but hey once you're done trimming it all it'll be rewarding haha