I will echo Mike's post, in that many photographers will kneel or crouch for a better angle. I guess it really does depend on the subject matter, and the perspective you're after.
If it helps, I can offer my observations at perpective, and say it's not that great being 6'6" either!.... with the exception of press photographer ladders (maximising the likelyhood of a 'clean' shot without someone getting in the way....and to reserve your patch), quite often a lower perspective can add drama to a shot, but again depending on subject matter.
Sometimes I feel it might not be such a coincidence that so many of the great photographers stretching back to the early days of photography weren't exactly tall people, whether or not they used waist or eye level finders.