So long as you don't add sugar or full cream, tea is actually generally good for the diet. It's basically nigh-indigestible plant matter in water, after all. Some herbals are especially marketed as "dieting tea" because they increase your metabolic rate, are high in fiber, and have basically no calories. (Blueberry tea, BTW. It's pretty good.)

Straight black, especially the typically stronger breakfast teas are a little hard to take straight, though. You could just add skim milk, but purists would argue. Afternoon black teas are mellower, so you can take it neat if you don't mind some bitterness. Unsweetened iced teas are diluted enough that you also usually don't need to sweeten them if you aren't someone used to it being sweet. Something like Earl Gray (famous among ST:TNG fans for being Cpt. Picard's choice) is mixed with bergamot, so you can easily drink it without adding anything, though.

I really need to sit down and try some teas out.

Gollgagh said:

I really need to sit down and try some teas out.

If you want some recommendations...

For bags of instant, I've absolutely fallen in love with Egyptian licorice mint, which is an herbal (so it's completely decaf) that is good for digestion/antacid. (Great since I like spicy foods that give indigestion.) It's also naturally mildly sweet. I drink like a gallon of this stuff a day.

For a special treat, if you want to go through the complexities of making a "real" pot of tea loose-leaf, Darjeeling is my favorite "relaxation" tea. It's a little bitter, so you're probably going to want some whole milk/cream/half-and-half in it.

If you have a bit of a sweet tooth, about 11 ounces of darjeeling, 2 ounces of whole milk or 1 ounce of half-and-half, and half an ounce of Torani's chocolate mint syrup makes something that tastes akin to the best hot chocolate you've ever had cranked up to eleven. I serve these to guests, and it has yet to fail to impress.

I'm also fond of green mint tea as something you don't need to add anything to. (But then, I'm fond of mint, if you aren't catching the trend.)

I'm not fond of it, but Chais have a very strong cinnamon taste, (not big on cinnamon, myself,) and my father practically binges on chai latte.

Herbals in general are quite diverse, so you should experiment around. Try a sampler, there's bound to be something you don't like, and you'll wind up with a box of something you hate, looking around for friends to pitch the pomegranite or orange zinger off on. (Sometimes, you can just blend a few together, though, and make something more palatable - I got a "purely mint" once that was just... pure mint, and found it best to just mix with something else to give it more complex flavor.)

Tea's natural goodness is a bit like salad. While the original product is healthy for you, both of them can turn very unhealthy with all the sweetening and flavor adding junk people put it on it.

Adding in loads of cream and sugar to tea. Or adding in like 5 pounds of dressing and other junk to a tiny bowl of salad.

Tetsamaru said:

Tea's natural goodness is a bit like salad. While the original product is healthy for you, both of them can turn very unhealthy with all the sweetening and flavor adding junk people put it on it.

Adding in loads of cream and sugar to tea. Or adding in like 5 pounds of dressing and other junk to a tiny bowl of salad.

Well, again, that's why I prefer to mostly drink teas that I can drink either straight, or just with some skim milk.

Most herbals don't need any sugar or cream, and some, sort of like eating celery, actually take more calories to digest than you gain from digesting them, making them have "negative calories", and are therefore "dieting tea".