All of my Thistle & Moon teas come loose-leaf, not pre-bagged. Some folks are daunted by the steep-n-strain process, if they're not used to it. Yet, believe you me: the benefits far outweigh the inconvenience.
Herbs have to be cut so small to fit in conventional teabags; sometimes they're almost pulverized into powder to fit the tea bagging machine's needs. This practice exposes more of the plant's sides to air. The problem, of course, is that air makes food stale quicker. Serious coffee drinkers keep their beans whole, and grind as they need. In my mind, herbs need to be stored as large as is practically possible, for optimal freshness and flavor retention.
Another important factor is the actual experience of making the beverage. The plants in these tea blends are so beautiful to behold, and the differing colors and textures and aromas all conspire to delight the senses. Our senses need to be nourished! Beauty is a form of medicine, when you think about it. Beauty is often overlooked by its more bossy cousin Efficiency, and while we may accomplish "more" tasks, there is a price to pay. Overwork, exhaustion, joylessness: these conditions never seem to be the result of having too much beauty and simple pleasure in our lives.
I feel strongly that we humans evolved with an appreciation for how leaves act in water. Our species has logged maybe a gajillion hours watching leaves float on water, then sink as they saturate, as they release their qualities into the water. We don't always have time to sit around and watch the herbs unfold and swirl into the water, and I myself usually use those individual disposable tea filters when I pour myself a quick cup, to be perfectly honest. But even in the three seconds it takes to fill up the paper filter thingy with the spoonful of herbs, I have that moment of recognition, that direct relationship with the actual plants. And that, my friends, is priceless.