Funny isn't it, you may have been doing something for years, and it was just yours - then someone comes along and tells you it has a name and is a "thing". It is an entity.
That's what happened with my own doodles, I found out that my mere doodles were actually zentangles. I'll be honest, at first I was rather reluctant to take on this new title for my doodles, and didn't want to learn patterns...and then I had a go. Hooked. Yep I love it. And it is absorbing, relaxing and of course additive. Even my boyfriend had a go (after his famous sonic drawing, obviously).
If you haven't tried it yet, turn your doodle into a zentangle. It's good fun.
Top two photos are my boyfriends, I think they're brill. The last is mine.