I don't have quite the experience with programming languages this guy has, but I've found myself enthralled with functional programming as well. Lisp is really cool, I'm really interested in Scheme in particular, and beyond that Haskell, Erlang and R (I like math). I don't know where this is taking me but it feels exciting.
I feel the same. If you want to dig even deeper, I find the array languages extremely fascinating. Look at APL for instance. I'm really excited about it coming to android, as it's terse enough to work well on phones, especially since phones can handle any arbitrary keyboard layout.