If it has been created before and if it leaves me indifferent I pass
I walk away from it for a while, then see how I feel about it when I look at it again after drinking copious quantities of alcohol.
Every idea is good. It just depends how you work with it to develope it.
I mostly let the client figure out what they think is best. If itís a personal project I try to show my ideas to a close circle of friends and peers to get their opinions.
If I am able to execute it the way I imagined in m head, it is a good idea.
My work is appreciated by others so who am I to judge some one's tastes and judgement.
Haha, I think this is pretty self-explanatory. How do you evaluate whether a horse in front of you is fit to ride? Does it have a head and four legs, a beating heart, and brain in its head? Or is it upside down with two legs, dead, and a vulture on its back?
If it looks good to you, then great, ride it out.
If it 'satisfies me' somehow- - - whether it acts like a punchline to a joke, or the answer to a question, --- somewhere in my gut I feel 'satisfied'.
((Even a bad idea SOMETIMES has enough 'good qualites' to be salvaged, as long as that 'gut feeling' is there.))
I rough it out, play with it and dozens of other ideas and if it resurfaces it must be intriguing enough to reevaluate. Often, though, I'll have several ideas going and suddenly one or two new ones jump into mind and those old ones seem archaic. If a design has all the elements that I like to paint, then I usually pursue it if I have the time and energy.
by looking at the composition and examining the relationships of the shapes and forms to each other
Sketch it out, if it looks good as a sketch it will probably look great as a finished piece.
I belong to a critic group developed from when i was at university so whenever i feel an idea isn't quite working i run it past them to get some outside opinions.
I think time is the best indicator if an idea has merit or not. Often I will wait months to start a new series after I've planned it out.
I don't really try to evaluate whether or not an idea is good or bad. Sometimes you just know if something doesn't work. I just try to make it as aesthetically pleasing as possible. Of course subject matter is important but you can't really go wrong with the female form.
If I look at it the next morning, with some distance, and I still chuckle then I know there's something to the idea. In illustration, it needs to be simple and a "quick read". So, if I get that kind of reaction from the art director, or my wife, or kids, or whoever is at hand, then I'm pretty sure I've solved the problem well.