I have a theory that your brain doesn't want you to become lucid. This may be because of the frustraton I have had lately with becoming lucid while still having very vivid dreams, and good dream recall. Those "Why the heck didn't I realize I was dreaming" type of dreams.

Anyhow, I've started incorporating dream signs. If I see certain people, or am at a certain location, it's a dream. It's worked a few times in the past.

Two nights ago I had one of those types, but NEW people (that I knew from school) were in my dream. I woke up and added those people to my list.

Last night I have another dream with even more people I knew and that I haven't had contact with for 20 years. My brain tricked me again! It somehow knows my dreamsigns and finds others from WAY back in my memory and uses them.

Every night I tell myself I will become lucid, but it seems somehow my brain tricks me making this "just real enough" for me not to become lucid. (I've been using DILD for 15 years or so now, normally with great success).

The frustration doesn't help, I know. But curious if anyone else has similar experiences. You say something like "If I see Joe or Jack from high school, 20 years ago, that's a dream sign" and your brain never shows you them again, but shows you Jim and Bob! lol...