Always make sure that customer needs come first.
If you don’t know what they need, go find out. If you talked to them and still don’t know, ask different questions.
If you prefer to build, then build fast and get something (anything!) in people’s hands.
Then, find out everything you possibly can about what they really think. What they love and hate.
Start by stating what you’re trying to learn before you ship.
Then figure out the fastest path to learn.
Typically you’ll ship a smaller chunk than you initially thought to achieve the same goal.