Larger numbers do not really give better feeling for progress. At least for me the WoW way was just way off for me, never played beyond level 91 if I remember correctly.
If you have far more health, enemie will just deal far more damage to compensate and stay at the same level, so in the end, 5 million HP is not really more than 11k would be, the numbers just look bigger.
That's why I don't like the attributes. They don't deliver real developement, only exploding numbers.
