I'm a huge fan of loose leaf tea, and my preferred brand, Clipper, have a fantastic loose leaf green tea.
It tastes as green tea should - clean, light, but also with a few deep notes as a mark of it's strength. I like it relatively weak, but it is easy to build up the strength of the tea - simply add a few more leaves. You don't need a lot for a stronger cup, so be light-handed.
You can't get this everywhere, I found it in WholeFoods for $3.00, but if you don't have a store near you, you can find it on Amazon, or the Clipper tea website.