Top 5 monkeys (+ worst ever)

1. Pygmy marmoset
2. Howler monkey
3. Titi monkeys. Examples include the "brown titi," the "ornate titi," and "Prince Bernhard's titi" among others (all real names).
4. Brass Monkey
5. Davy Jones

Worst: Marcel from Friends

Disagree? Submit your own list as a comment!