For me it is indeed the latter. I can glean a lot of interesting stuff from other languages as long as they look a bit familiar. Haskell I usually come to a dead stop pretty quickly.

I've tried to read up on some Haskell basics, but the main issue is I don't have any real incentive to use Haskell, I have other hobbies that are more tempting, so I forget pretty quick.

The Java-ish version of the Functor interface for instance was quite readable to me, ugly or not.