I have never seen one that I was appalled by.. that is for sure

I haven't put much thought into it.. but I guess that a larger head would be the most visibly stimulating.. but actually.. there isn't that much differnce in most men I would imagine (difference in the size between the head and the shaft).

I don't think I have ever seen one that I would turn away (it is the man attached to it that seem to be the problem). LOL