I have found with some that it's obvious they're keepers. I try to stay with those.
I remember the very first year I had seedlings bloom I had a nine month old with a 52 bud count and you KNOW Dan doesn't fertilize alot! The bloom count wasn't anything special and I asked one of the "big guys" if I should keep it (not Dan) based on the scape. He said "no" and I didn't and have been kicking myself ever since.