Vocal
tone. Not necessarily a massive range, because whilst impressive, I don't think having a huge range is at all necessary to be a great singer. However, if you have a unique, pleasant, accessible, marketable tone, that's literally
gold. It's something I lack and I wish I had so bad.
People who can't perform are just lazy, it's something you can learn or at least work at to get better. Song-writing is also a must for me but it's not something I feel I struggle much with.