This has often been discussed, so I'd like to hear your thoughts.
How powerful is your ideal Superman?
How many tons can he lift? 100? 1000? 1,000,000? Planet-moving? In between?
How fast is he? 1000000 mph? 641,999,999 mph? 650,000,000? How fast should he be?
How much damage can he take? A nuclear bomb? A supernova? A cruise missile?
How good are his senses? Can he hear what's happening on Mars?
How good are his reflexes?