Now I'm not as avid a collector as some of my fellow geoscientists and I don't generally buy rocks. I prefer to build my rock collection around memories. For example, I found this amazing rolled up trilobite on my Paleobiology field trip and it always reminds me of my narcoleptic professor. When I lived overseas during high school in Indonesia, we once hiked up Anak Krakatoa and I collected a piece of pumice bigger than my head! BUT I do accept rocks as gifts! Some of my favorites are an aragonite wedding favor and a piece of Mount Doom (Yes, that Mount Doom).
Every time I gaze up there, I get a wave of joy as memories come flooding back. Geology is love.