I have never seen anyone speak in tongues, though I would like to someday.

I think it is interesting how adamant Paul is in this chapter that speaking in tongues is speaking to God, not other believers or non-believers. He is not downplaying tongues as a gift but he is pointing out that it is something between God and the individual. And, I believe that later in I Corinthians, Paul admonishes folks to not speak in tongues unless they have an interpreter present.