Accessibility to the CEO, how much they value your input and how they give you the chance to try out ideas that can result in you celebrating your successes or learning from your mistakes.
What I wish was different
Nothing that I can think of at the moment.
Don't be afraid to try something new! That is the beauty of working in a start-up culture. New ideas are constantly coming up each and every day, and that is what makes this sort of work very exciting.