I'm very much a newbie, but I'll give this a try (and then maybe you'll be patient with me and my questions

How long have you been drinking tea?
I've been drinking tea for four years or so, but I've only been serious about it in the last few months. I started with teabags and moved to loose leaf teas about three years ago, then went back to coffee, and now it's back to tea.
What kind of tea do you drink?
In the morning I have matcha or some type of English breakfast blend (sometimes scented, sometimes plain), or Lapsang Souchong (when I don't have coffee). After that I switch to Japanese or Chinese green tea (as a newbie, i bought all sorts of things and I'm still exploring flavours so it really varies), until around 4 pm. In the afternoon I switch to herbal infusions (these days it's mostly a hibiscus and apple tea blend) and at night I have chamomile and/or linden and/or chrysanthemum tea (sometimes blended with spices like cinammon or saffron etc).
How do you prepare your tea?
Simply... I've just bought a gaiwan so I'm enjoying exploring how best to do multiple infusions with that. Otherwise, I have a teapot for my herbal infusions and one for the other teas and I try to follow the instructions given to me at the teashop (for example, 1-3 minutes for green teas at 70-80 degrees C, depending on the tea, etc.). As said, I'm a newbie and I'm learning (i.e. experimenting).
What tea knowledge are you interested in exploring right now?
EVERYTHING!! (Sorry, I get easily excited! especially when it comes to tea)
What factors lead you to delve into the world of tea, and what is keeping you there?
I like coffee, but, compared to tea, it feels very.... one-dimensional is the wrong word. It's like with coffee there are variations of flavour, but with tea, there are many, different flavours to enjoy. It's exciting to try something new every time - and especially when I consider the different ways of making tea, and the difference of taste one can get out of different infusions.... tea does feel like a more interesting and surprising drink! That's also what's keeping me here! The quest for more flavours and more knowledge!
What is your location?
Aarhus, Denmark (but I am from Greece and most of my herbs also come from Greece, either from the areas around my hometown, or from my father's village).