I think stateful things are too hard to do in Haskell, and they are an
important part of most real-world programs.  Clojure's blend of
persistent data structures with a variety of reference-type objects
that can contain them feels much more pragmatic to me.  Also, I'm just
happier working in a dynamically-typed language.

As a side note, years ago, I wanted to write something in Haskell that
worked like Clojure's memoize (which is implemented in a half-dozen or
so lines of code in Clojure's core), and asked about it on the Haskell
mailing list.  I was pointed to a PhD dissertation on the topic of how
to write memoize in Haskell.  All I could think was, "Do I really want
to be using a language where memoize is a PhD-level topic?"