The Australian Sentinel - never used, but it remains my favouite 'what if' tank. Well designed, good armour, capable of much upgrading (originally armed with a 2pdr, later prototypes had a 25pdr howitzer, a 17pdr, one test rig even had twin 25pdrs!)
Tiger I. I think for the fact that it played a prominent part in all the battles of WW2 which I am most interested in (Kalmyk Steppe battles, Kharkov, Kursk, Dneiper bend battles, Cherkassy, battle for western Ukraine, Normandy, Bagration etc to name just a few. Mind you, the Panther also played a major part in most (though not all) of these battles and more but there's just 'something' about the Tiger I that does it for me.
I can't choose!! The most beautiful IMHO is the JagdPanther, then the King Tiger, then the T34/85. But the Panther G was the best. I think. We're still nowhere near the end of that discussion... Welcome to the forum tiger1.
I have to agree that the most beautiful AFV ever built was the Jagdpanther. I love it's lines and angles.