I know I can use the thread cutter on my machine after I finish a seam but I always use scissors. I keep reminding myself that it's there for a purpose, but somehow I just developed that habit.

Yes and yes. I read about a different way to do a process, for example binding, I mark it make a mental note to try it, then proceed to do it the old way. If I am doing a new to me process it sometimes evolves as I am doing it. Just recently FM quilting was like this, the quilting I started with is different than the quilting I ended with. Oh well, I call it the creative process.

Do you think its like the body memory we get when we FMQ? You get into a flow and just keep on going?

We are creatures of habit...................

I do the same things all of you have mentioned. Very interesting. Isn't it fascinating how we adult humans seem to work on auto-pilot even when we think we're driving?