If It Looks Like a Cow, Swims Like a Dolphin and Quacks Like a Duck, It Must Be Enterprise Software

Too true...

What is the easiest/best first functional language to learn ?

I'm planning to teach myself a functional language, but I'm not sure where to start. Thinks that have been catching my eye are Erlang, Haskell or Scala.

If you have any advice, please let me know !