Have you ever created your own language?

I know this is a long shot because this is not a very common thing to do, but has anyone here ever created or attempted to create their own language?

It’s been something I’ve been working on for several years. It never seems to end because as I take more linguistics classes, I think of more and more to change and add. I haven’t done all that much yet towards my constructed language, but I have to say it is one of the most interesting and enjoyable things I have ever done.

Has anyone else done this kind of thing or I am really just that far out there? :P