Since a lot of my original stuff employs altered tunings, I find it takes too long to figure it all out to notate my stuff; typically I'll do a brief tab sketch of my own stuff, but really hardly ever.

With my students, I encourage them to learn to read standard notation, but tab always wins the day for ease of writing and speed of writing within the context of a half hour guitar lesson. For the few who do want their lessons etc notated, I always tell them I'm happy to do it but I also tell them it does take quite a bit longer for me to write out neatly and accurately.

I've tried some of those notation programs, but I really have no need for them for my own music, though I've heard tell of some guys who just start messing around putting down any random notes and then try to play it, I guess it removes the "writing habits" we all seem to have though!