I enjoy airport codes!
I like coming across obscure airport codes and I can discover plenty on this forum! A bit of a history and geography buff, I can be sure when there's a weird code there's got to be a reason behind it so I'll look it up.....for fun!
I suppose it's sort of frustrating when reading through someone's post here but you're on flyertalk, if there was ever a forum to use airport codes it would be this one. Also, since twitter, most cities use their codes as their handle and I find myself googling what city they actually represent. I find small Canadian cities tough to crack!