Prefer the British brands mostly, even though, technically, Sir Thomas Lipton would have been a Brit.
Twinings, Tetley, Typhoo (though I don't see it much), Lyons (not seen here at all), PG Tips (also not seen here).
I generally brew one bag per pot.
I used to be a big Earl Grey fan, but any more I'm preferring the plain black teas, with my current favorite being Darjeeling.
I like green teas and Jasmine tea, and an occasional white tea (although some of those are kinda "meh") and a good Oolong now and then.
My current "staple" is 100-count boxes of Tetley bags. They are stringless/tagless, so after they've been in the pot for the desired brewing time I have to fish them out with a spoon.
I drink my black teas with a spot of cream (half & half) or alternatively milk, excepting occasionally Darjeeling, which I'll drink straight. I drink all green teas, white teas, Jasmine, and Oolong teas straight.
For what it's worth, I seldom drink coffee at home, normally brewing a pot if my daughter wants one for some early morning doings. Away from the house it's hard to get a decent cup of tea, so I usually settle for coffee of some sort, with cream.
Given my druthers, I take tea (properly brewed) over coffee.