Unfortunately, I've found that describing what I've learned over the past three years (without any negativity) gives founders the ick. The survival skills you need in the jungle are very different from the ones you need in a zoo, and they feel I've spent too much time in a zoo.
Similarly, large companies want to hire people who understand the value of processes and hierarchies, and interviewing at these places is a challenge for those who have spent most of their career in startups.