Ok I know this is a ridiculously daft question as the answer is fairly obvious....a big glaring: BECUZ WE ENJOYZ DA DIFFARUNCE!!
Oh and because we also notice difference easier and so it becomes something of interest.
But I just wondered why that should be so. For example I love comically witty skepticism, but I possess none myself, or at least it is not a natural talent of mine.
Oh well it's that old cliche of learning to respect what you can do and what you are.....maybe. Seems a little romantic and blind but maybe it is the truth?
Heh this probably isn't worth discussing, but I suppose that is what the bonfire is for.