To be a good bodybuilder you must be a good observer.
Yes it is better to keep training even if your muscle is still sore.
Perfect form is the most important thing to have a perfect body, it's impossible to make a painting with a big brush
If you don't like don't do it. But don't forget that: NO PAIN NO GAIN.
Trust me when you love something you don't need motivation.
Genetics help to some degree, but the most important thing is the mind and the spirit. These two are even more powerful than physical characteristics that are passed on.