NNY, c.i. responded -- I don't know about anyone else, but my brain was hurting too bad to think about anything but canoli
. (Must remember to exercise more) So now that I've had time to rest, here is what I think of your summary of meanings:
To be happy -- I like that one except that it then makes me have to analyze the meaning of "happy" (which makes me grouchy)
Religion or lack thereof -- That could be good except that then I have to ask why god won't just tell me why I'm here and ease my pain -- I tried athiesm but it ended up being too self-destructive in my little mind
Eye of the beholder -- that's the easiest and (I think) most logical
There is none, sad, depressed, etc -- Poor NNY! (I hope that changes for you)
To make a dent in others lives -- I like that one too. Even if they are dead and their skin is rotting off, you have to think about the "mutual dent" -- aren't you kind of happy that you knew that person and had (hopefully) good times with them and that they made a dent in your life, even if they can't make any new ones?
Eureka factor -- Those happen too often only to prove themselves wrong a few years down the road. And like c.i. said, sometimes the "Eureka Factor" can cause them to end it.