People can be good dream signs, yes. And they can be real, fictional, alive or dead. One deceased friend has triggered lucidity for me twice (both of the times that I dreamt about him since his death). But then I have the relatives who live in other towns that I dream about on a very regular basis but NEVER think twice about. In both situations, the 'people' - DCs - in question can be considered dream signs but their usefulness is obviously very case sensitive.
The most useful dreams signs are the things and situations that are unlikely to happen in real life, for me at least. Though I realise it varies from person to person and time to time. It seems that the most common dream signs are the one's that have the lowest probability of triggering lucidity. Those are the classics: falling out/breaking of teeth, water situations, floating/flying, bathroom mishaps, wielding magical powers, being in person with DV/MM members, lost at school, etc... If we could only tap into - and dependably recognise -
those kind of dream signs, think of how dramatically we could each increase our lucidity rate!
But all dream signs are useful if recognised for what they are, which is why listing them is such a good idea. You become more consciously familiar with them and, as result, more prepared to latch on when it really matters (during a dream).
I don't have any constant signs in dreams that I'm in a dream
Generally, my dreams are scattered and random with only people as constants.
How about emotional states, such as nervous or stressful situations? Odds are there's something there if you look hard enough, even if it's somewhat vague at first.
Sorry I haven't been able to spend much time here the past couple of days. Busy with life and all. But I'm still following the program
*scurries off to workbook*