Work ethic is the single most important enabler of success. I'd say discipline, but I'm afraid I don't know the meaning of the word.I don't have a 4-year degree and I'll admit - it took longer and I had to work more/harder to get where I'm at, but I'm now a 3%'er or 2%'er, whatever the class warfare dolts want to say now, and I've done it on my own.
Congrats on your hard work. Well done! I was lucky, in Silicon Valley if you are willing to do the work, companies will help you through college. I got my 1st degree at 40 mostly paid for by the companies I worked for.