I actually just started drinking tea (aside from Lipton) in 2006, so it was a lot of trial-and-error for me.
I think one the best for me was seeing Stash tea become more and more readily available in retail stores.
And the worst was probably the Owling tea set sold by Anthropologie. I got it as a Christmas gift, and it is undeniably cute. But the pot and cups get really, really, almost untouchably hot, and the infuser doesn't keep out small leaves that well. Also, it only holds about 12 ounces.