By far and and away the most common criticism of utilitarianism can be reduced simply to: "I don't like it" or "It doesn't suit my way of thinking". For an example of this, here's something from someone who might prefer to remain nameless.
"Producing the greatest good for the greatest number is fine as long as you are not hurting someone you really love in the process. For instance, with the trolley situation, I would rather kill 5 people on the main track than m mother on the spur track. Utilitarianism runs into problems when sentiment is involved!!"
I suggest one certainly will have a problem if one tries to merely codify one's personal inclinations - and then expects this to hold as a universal standard of