Ask HN: What is your favorite YC startup?
Based on any factor(s) you want. :)
- Dropbox. They have an awesome product and it generates a lot of revenue. I believe they will be the first mega exit for YC. At least $100M and probably closer to The Big B. 
- Sorry, I have to choose multiple for various reasons: - AirBnB, because it appears to be immensely profitable and those guys worked hard in some very creative, unorthodox ways to get it going. - Justin.TV, because the founders have always been nice, helpful, and approachable with me whenever I've needed advice/help/insights. - Directed Edge, because wheels is wheels. 
- From exit and revenue generation perspective, my vote goes to - - - Dropbox: Great product. Awesome team. Good market with revenue possibilities. - - Hipmunk: User experience in flight travel search has sucked for a very long time. But, users are now getting spoilt by ridiculously awesome user experience provided by companies in a lot of different areas. So they will start expecting the same for travel search too. Hipmunk could totally revolutionize travel search and make it exceedingly simple and pleasant experience - their team has potential to make it happen. And, travel search is a huge opportunity from revenue perspective.