Lets tank about types that may be considered MBT's of WWII. Tanks types weighing 40 tons and more. Which tank type would you have prefered to command and motor around in during the war and why. The time frame that any of these types were operational to be considered.

Russians: KV-1 series / IS-2 Series
Americans: T26E3 Pershings / M4A3E2(76)Jumbo's
British: Churchill Series
Germans: Tiger I / Tiger II / Panther