Life would not be worth living without Iced Tea. It has been my favorite beverage for as long as I can remember. When I was a kid I preferred it with a ton of sugar and some fresh lemon, but now I prefer unsweetened with lemon. At one point I was drinking over a gallon a day, but I've cut back to a half gallon or so a day.
When I brew my own I prefer Lyons tea bags from Ireland. When I was in Ireland I couldn't find iced tea, many people had no idea what it was. The folks who owned the B&B we stayed at had me show them how to make iced tea.
My preferred bottled iced tea is Lipton Pure Leaf unsweetened black tea. If I buy a sweetened tea I get Turkey Hill. I also enjoy the Philly area classic Arctic Splash if I can find it. Arctic Splash is not particularly good iced tea, but it used to sell for .25 cents a 16oz carton. Yes, waxed cardboard carton, the waxed cardboard adds some extra flavor. Last time I bought it at the Acme it was up to $1, but the nostalgia was worth it. The empty cartons were a common sight in the Fishtown section of Philly, leading to the creation of the "Fishtown Iced Tea". Take a carton of Arctic Splash, take out half the tea, replace with booze, and enjoy from the carton. Great for avoiding those annoying open container citations when socializing on the front step or street corner.