I think for me perfect is....
Will it shoot with consistent accuracy? (more to do with me the archer than the bow)
Does it hit hard enough to take a deer cleanly? ( doesn't have to be a screamer for that)
Will it hold up and last for a long time? (make enough and there is always another waiting to hunt on the bow rack)
Is it not so ugly that I'd won't be embarrassed to claim I made it. (only matters in the eye of the bowholder)
other than that they are all good
Still I try to make the best bow I can! (most times)