Plujka is just a nickname, it's not a formal title or anything. As such, there are no real traditions associated with it. I don't add sugar or milk or anything, either, it's just leaves and water. The tea I drink is generally good quality, stuff from Adagio mostly. There is a little bitterness in it, though. Not in most of the tea, but the tea at the bottom, when the water level goes under the level of the pile of leaves at the bottom, tastes a little bitter. When I brew from a pot, the brew is generally more bitter. I use a glass pot with a glass leaf basket inside. It's basically a glass cylinder with the bottom sealed and a few holes drilled in. The tea from that, even when made exactly to canonical specifications, is no better than tea made by just dumping leaves in the cup. Perhaps the added bitterness is because the brew basket keeps water from circulating, leaving a super-concentrated brew in the basket that only goes outside into the pot proper if the pot is lifted. I'd imagine that tastes bitter, but would also imagine that it's fairly diluted in the pot proper, so the end product is no stronger than if the leaves were just free-floating.