"Yes sir, there's a lot to like about Don's story: do what you love, focus on a niche, find a viable business model, and work for yourself." That's what I'm tr

"Yes sir, there's a lot to like about Don's story: do what you love, focus on a niche, find a viable business model, and work for yourself." That's what I'm trying to do (and most YC readers) but it ain't easy and determination/perseverance is probably the #1 criteria for success.