My favorite thing about reefing is seeing children's faces light up when the visit my house and see my reef tank for the first time! That and the challenge of keeping everything healthy...
My favorite thing about reefing is learning and research. Since I have started my saltwater tank I have been diving into research and learning everything I can about all areas of reefing. While I am new to the hobby I have enjoyed more and more with each passing day and it is a great stress reliever for me during the week.
My favorite thing is getting a brown piece of acropora and seeing what it turns into in a few weeks. You never know what your going to end up with and its crazy watching it change a little everyday.
My favorite thing about reefing is the challenge of figuring out all the little intricacies of getting everything just right for things to grow properly.