re: What was the best WWII tank?

The T34 was a great tank, but certainly not from a technical standpoint. Most didn't even have a radio. The T34 was however easy to produce, had decent firepower especially in the T34/85 iteration and sloped armor giving good protection.
It used a Christie suspension (American inventor) system that most other countries found less than ideal, and when matched tank to tank with German armor other than Mk 3 and 4 panzers was out of its class.
It was produced in huge quantities and huge amounts of ok beat small amounts of excellent everytime.