As someone who's new to loose tea, I would strongly suggest that anyone just starting out not follow the brewing instructions at the link posted above.
I initially tried my first cup of gyokuro a couple of nights ago with one teaspoon per cup, and while I found it light, it was very enjoyable and complex. I noticed this thread the same night and decided to try two tablespoons per cup at 140 degrees, in a preheated pot and cup, as suggested. I took one swallow and it actually made me feel ill. And please understand, food and drink rarely make me feel that way; I enjoy complex, dry wines and cheese that most people probably wouldn't even go near.
However, the Adagio gyokuro, prepared in this way, tasted wrong.
I've been happily sampling 7-10 teas per day for the last week, across categories, and every one of them was interesting in some form or another. But this concoction made me actually stop drinking tea for the night. I had a bad taste in my mouth, my stomach was gurgling, and I felt light headed. The most irritating part is that I used up half of my sample and couldn't even enjoy multiple infusions. I threw it all out.
Anyway, try two teaspoons per cup and decide if you like it before you move on to tablespoons. Other than this particular cup of tea, I've had a blast with my tasting experiences thus far, and expect to have many more.