This song by Charlie O'Hegarty begins with the verse:

"There's all sorts of people who people this earth.
Somw people judge people by what they are worth.
Some people hate people and that's really the worst,
for we're really not so different as we might seem at first.

Later verses have long twisting lists of different kinds of people with the chorus:

But there's one thing in common and I really must say,
We're all happy when the sun shines and it's a beautiful day.

Any one know the other verses?

Glen