Talking too much or not enough is a common mistake in interviews and is often the result of nerves, but avoid talking about everything at once. It's important to sell your skills and experience without digressing. One of the worst interview mistakes is not being able to back up your statements. Instead of telling your interviewer what you're good at, you have to show it to them.
The best way to do that is to share examples and success stories. It's a clear indication of your lack of interest and respect for the interviewer and your company and, without a doubt, it's one of the worst interview mistakes you can make.