Yes the quality of an idea is a multiplier - I like to the think of execution as the multiplier of the idea given good ideas are rarer than good execution, but this is just personal preference.
Good ideas do have intrinsic value, because if you tell me a truly good idea I will steal it from you. If you have any idea that ticks 10 or more points from my list please send me an email telling me all about it :)
Hmm. Maybe. (re: execution being the multiplier) I'm not completely convinced either way, I guess.
if you tell me a truly good idea I will steal it from you
I think perhaps most people don't have a list, like you do (even unofficially in their heads). Most people are too busy with their own ideas to bother with others, even if they really are great. I suppose if you have a criteria for measuring the quality of the idea, as you do, then you can make objective decisions about an idea based on its actual merits (as defined by your criteria) rather than gut feeling or wanting to work on your own stuff.
I suppose what I'm saying is that most ideas are cheap because most people don't have a good way of objectively measuring their value beyond executing and seeing how it goes.
Note though that I've usually heard it as "ideas are cheap", not "ideas have no value" -- despite what I might have said in my previous comments :D
Yes I think if I have anything of value to contribute to this topic it is not my criteria of what is a good idea or not, but the idea of having some sort of objective list of your own. I would encourage everyone to put together their own list as just the process of doing this is highly valuable. In doing so you start to question your own assumptions and work out what is important to you.
Good ideas do have intrinsic value, because if you tell me a truly good idea I will steal it from you. If you have any idea that ticks 10 or more points from my list please send me an email telling me all about it :)