If my memory serves me correctly, IE 6 was actually the fastest browser when it came out, and it correctly rendered more sites than Netscape since people often only tested their sites in IE. In 2001, running IE 6 was relatively pleasant.
I'm so glad we've moved toward a more objective definition of "correct". I remember trying to tell people that IE didn't do things the way it should, and they would just respond with that it was "correct" because they only ever used IE.
The analogy I have always used: surfing the web with IE is like eating food you find in the dumpster. If you're very, very careful you can stay healthy for a long time, but eventually, you're going to catch something.
Surfing with IE6 is like drinking 9-year-old milk you found in the dumpster. It wasn't a good idea when it was just-expired milk, but now it's even worse.